Amazing knowledge

Chapter 5 The Little Body Code: Finding out about the body is the most important thing
*Why do people get dense phobia?

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Some people feel their scalp numb when they see a hornet's nest. What scares them is not the flying wasps, but the densely packed honeycombs. These people may feel uncomfortable when they see the mouth-watering strawberries. They are not hypocritical, but sick—intensive fear disease!Why do people get this disease?
In ancient times, people would have a sense of fear for insect eggs, skin herpes, and social insects. At that time, let alone medical conditions, there was no medical treatment at all. Once people were infected with these things, they might die immediately. , so these things are almost like reminders in people's minds.Although the current medical conditions are good, and serious and minor illnesses can be treated very well, the fear of these things in the bones of our ancestors has always remained.Some people have perfectly "inherited" the habits of their ancestors, and they are still afraid of these things as always. These people are trypophobia patients.

These densely gathered things will make many people, especially those with trypophobia, feel uncomfortable, have a numb scalp, and have an inexplicable sense of fear.But after these things leave people's sight, these uncomfortable feelings will disappear.

Some people may think that many things in life are also densely packed together, why don't people feel sick?Take the most common rice as an example, a bowl of rice is also a lot of millet grains gathered together, but even people with trypophobia seem to be "immune" to them, this is because we have subconsciously defaulted that rice is good With rice, we don't have to go hungry.But if you replace the rice grains with insect eggs, which are about the same size and color, if such a bowl of insect eggs is served in front of you, will you feel sick?
The final word: The reason why people have trypophobia is because they feel that densely packed things will threaten their own safety, which is a "physiological memory" preserved from ancient times.Trypophobia is just a psychological reaction, which is harmless to the body and does not need to be treated with drugs.

*What's the matter with the words coming to my lips but not being able to say them?

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There is a song that says: "Loving you is hard to say..." Although people who have love are often ashamed to express it, even if we don't have this kind of emotion, we often can't say it when it comes to our lips. This is another What's going on?
If you are usually chatting and bragging, it’s no big deal if you can’t get your words out of your mouth. I’m afraid that you will “tie a knot” when speaking or in front of someone you admire.In fact, this phenomenon has a lofty name called "Tip of the tongue phenomenon", or "TOT" for short, which is a phenomenon of failure to retrieve memory.

The specific manifestation of "TOT" is that when I have almost completely recalled it, I can't express what I recalled in words.In the opinion of psychologists, this phenomenon is mainly related to psychological anxiety.Some people feel embarrassed to speak in public, especially when the eyes around them are staring at them, let alone fully expressing what they think, it is probably good to be able to speak, The brain directly "frozen" and could not think of anything. This is an obvious phenomenon of anxiety.

Under normal circumstances, this symptom will only come to the door occasionally to "harass" people, and it will not happen frequently.But if the "TOT" phenomenon occurs frequently, then you really need to eat some snacks, which has become a morbid existence.

In addition, people who have mastered multiple languages ​​are much more likely to experience the TOT phenomenon than those who only know one language.Because people who can speak multiple languages, in the process of recalling, when organizing language to express what they want to express, they often have a variety of different expression tendencies, so it is more likely to appear that the words cannot be spoken. .

For the vast majority of people, as long as there are often situations where words can’t be spoken, people’s emotions will become more negative, and this negative emotion will bring a lot of trouble to people’s life and work. Impact.

The final word: Most of the words that can’t be said are caused by anxiety. In order to avoid frequent “TOT” phenomena, you can try to keep yourself young at ordinary times.When you have an important speech, you can relax appropriately and don't put too much pressure on yourself, so that you can alleviate the occurrence of this situation to a large extent.

* Can people really feel the gaze behind them?
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I believe that many people have felt that someone is staring at us from behind. This gaze from behind will make us more uncomfortable, but none of you have long eyes, and you can’t see what is behind you. We can really Do you "find" the gaze from behind by feeling?
In fact, the human gaze is nothing more than a vision of nothingness. We are not living in a science fiction novel. The gaze has no energy at all. The saying "killing you with the gaze" is pure nonsense.The reason why people feel that others are staring at them is just a psychological feeling!There are two main reasons for this illusion.

First of all, I can feel that someone is staring at me behind me, mainly because I have expectations in my psychology, almost knowing that I will soon "gather thousands of eyes in one body".

For example, students are called by the teacher to answer questions during class, or they have to give a speech in front of everyone. This special situation will make people feel that others are staring at themselves. The formation of this feeling is related to their own Stress matters.People's parasympathetic nerves will be activated at this time, the sensitivity will rise sharply, and the surrounding air will feel a little hotter.At the same time, its own capillaries will also expand, and the skin will feel oppressed.

Secondly, feeling that someone is looking at you from behind is also related to what happened suddenly around you.

For example, when sitting on a bus, if a woman is dressed cooler, she will often have thoughts such as "Is someone else looking at me?"This kind of situation occurs mainly because the human brain forms a threat message, especially if you suspect the person who is peeking at you, if there is a change in facial expression, you will be more convinced that the other person is peeking at you.This situation is mainly due to being too sensitive, so it can sense the threat information that does not exist in the first place.

The final word: Feeling that others are watching you is at best a feeling, not reliable, and more of a psychological effect.If women often feel gazes from behind, the best way is to try to dress safer before going out to avoid this situation as much as possible.

* Can the ears move?
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Children or young parents may know the cartoon "Big Ears Tutu". The lively and active Tutu also has a unique skill, which is "ear-moving magic"!But in the final analysis, this is also a cartoon. Can people's ears move in reality?
We all know that the ears of many animals are very flexible, even Tutu can't compare to them, like a rabbit, the pair of big furry ears are long and flexible, it is simply "ears follow the heart, move as you want" Just move."The rabbit's ears can move freely, but they are just moving for fun. The purpose of the rabbit's ears is to hear the surrounding sounds clearly.In addition, some animals such as cows, horses, and sheep also have the ability to move their ears.The main purpose of their ears is to enhance their hearing, to be able to hear more sounds, to prevent other animals from attacking them.

But compared with animals, our ears are not so flexible. How about turning our ears upside down a couple of times to become a stunt?
In the history of evolution for thousands of years, not only human beings have been advancing, animals are not inferior at all. Animals that can move their ears are generally advanced mammals, and humans are the most advanced among advanced mammals. A sort of.We are clearly the ultimate big boss in the history of evolution, why are the ears so disobedient, not as flexible as the "subordinate class"?

In fact, the reason why people's ears can't move freely is because people's evolution has been very perfect, and all tissues and organs of the human body have developed more maturely.People can walk upright, and can move their necks to adjust their vision, so people don't have to rely on moving their ears to enhance their hearing ability, and therefore the muscles that drive the ears gradually degenerate, so the reason why our ears The inability to move is not because we are not flexible enough, but because we have evolved so well, and other functions are too perfect, there is no need to move our ears for assistance.

The reason why some people's ears can still move is because these people still have some muscles around their ears. If you pull these muscles, your ears can still move a little.

The final word: Most people's ears cannot be moved at will, and those who can move their ears have stronger ear muscles. This is actually an atavistic phenomenon.

*Can a person suffocate himself?
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We all know that human beings must breathe. Without water and food, we can still jump for a while, but if there is no air, we will say goodbye to the world every minute.So here comes the question, it seems that the possibility of "suffocating to death" is quite high, but can "suffocating yourself to death" be possible?
Of course, we have the final say on whether to breathe or not. If you want to hold your breath, you just need to close your mouth tightly and control your nose not to breathe.However, although the rhythm of our breathing can be controlled by ourselves, in fact our breathing is controlled by our consciousness.That is to say, we are at best the second-in-command, we can adjust the speed of breathing, but breathing is not something we can "stop" by ourselves. The "manipulator" of breathing is actually our consciousness.

For example, people hold their breath subconsciously when swimming to prevent water from entering the nostrils and choking them; when sleeping, the body also breathes spontaneously.Breathing is not something we can control if we want to, the subconscious mind is the decisive role.If people's breathing is completely controlled by themselves, wouldn't they really be suffocated to death when they sleep?

Involuntary breathing such as during sleep is mainly controlled by the brain stem. The amount of each breath and the speed of breathing will be adjusted according to your body's needs.When the carbon dioxide content in the human body is too high, people's breathing will become deeper, and the breathing speed will also speed up, so that more oxygen can enter the human body to replace excess carbon dioxide.

It's okay to hold your breath, but it's impossible to suffocate yourself because your subconscious mind won't allow you to do so.Even if you bite your teeth and beat yourself to death, you don’t breathe. At best, you just faint due to lack of oxygen. When you faint and lose consciousness, your brainstem will still come forward to help the body recover. It is possible to suffocate to death, but it is absolutely impossible to suffocate yourself of.

The final word: If you want to attempt to commit suicide by holding your breath, it would be ridiculous. Even if you are strong enough to hold your breath until you faint due to lack of oxygen, you will not suffocate to death.

*Is it really possible to be "scared"?

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When people describe themselves as being afraid, they often say that they are going to be "frightened out of their wits".So can fear really scare the guts out? What happened to "scared"?
The gallbladder is an important organ in the human body. It is located at the lower edge of the liver and is shaped like a pear.The gall contains bile, which helps the body regulate pressure in the bile ducts.

Changes in the gallbladder will be affected by many factors. Exercise or eating will increase the pressure in the bile duct.But even if people are frightened, their gallbladder will not break, otherwise they will not be "frightened to death" first, but will be "died to death" by bile.

What people often say is "frightening the gallbladder" has nothing to do with the integrity of the gallbladder, but the functionality of the gallbladder.When the human brain is stimulated to a certain extent, the nerves will become highly sensitive, and various indicators of the body will also soar. Of course, the gallbladder is not missing.

When a person is frightened, he often feels that his chest is stuffy and flustered, and his heartbeat speed is also significantly increased. At the same time, symptoms such as scalp numbness will also appear.When people are stimulated to a considerable extent, their body functions will also be seriously affected, and people with some underlying diseases will fall ill.For example, people with cardiovascular and cerebrovascular diseases will quickly become extremely nervous after being severely frightened and stimulated, so cardiovascular and cerebrovascular diseases will recur, and even cause sudden death in severe cases.If you are really frightened, it may not be the gallbladder that is frightened, but the original lesion, which induces malignant disease.

There are really people who are "scared to death" in life, and this is because they have been severely stimulated.Everyone has a certain ability to withstand external stimuli. When one's own ability to withstand is exceeded, it will cause serious consequences, even death.

Bottom line: the so-called "gut scare" doesn't happen, and even if a person's gallbladder does burst, they don't die instantly.What people usually say about being scared to death actually has nothing to do with our guts.

*Why doesn't the heart get cancer?

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I have heard of liver cancer, lung cancer, pancreatic cancer, breast cancer, and almost all organs of the human body, large and small, are related to cancer, but it seems that I have never heard of "heart cancer".Why is the heart so special that it keeps cancer at bay?

Speaking of it, the heart is indeed so special that it can say "no" to cancer.The reason why the heart has such "magic skills" is mainly because of its structure.

The formation of cancer is mainly due to the epithelial organization of organs. It can be said that there may not be cancer in places with epithelial tissue, but there must be no cancer in places without epithelial tissue. However, the heart is such a place without epithelial tissue.Human epithelial tissue covers the surface of the human body, as well as inside and outside the human digestive tract, respiratory tract, and urogenital tract.In addition, human organs are also composed of epithelial tissue, so all these organs have the chance of getting cancer, only the heart has no epithelial tissue, so the heart will naturally not get cancer.

Furthermore, the unique anatomical location is also one of the capitals of the "willfulness" of the heart.The human heart and blood vessels together form a closed blood circulation system, so harmful substances from the outside cannot directly damage it.However, some other carcinogens can enter the body through the mouth, nasopharynx, stomach, lungs and other parts of the body, causing harm to various organs in the body, and then causing malignant lesions of the organs.Compared with these organs that are invaded by harmful substances from the outside every day, the environment of the heart is much better, so there is no possibility of any disease.

The blood of the human body needs to be continuously purified through the liver, kidneys, and spleen before it can finally reach the human heart. Even if the blood that has been purified through multiple layers contains some harmful substances, these harmful substances cannot cause damage to the heart.

In addition, the function of the heart also determines that it will not get cancer.The human heart is beating all the time, so even if there are malignant cells, these cells will be transferred to other parts of the human body along with the beating heart.

Bottom line: heart cancer is rare, but not impossible.According to relevant reports, there have been examples of AIDS patients suffering from cardiac angiosarcoma and malignant lymphoma.

*How much hair grows every day?
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Rapunzel in the fairy tale has long golden hair, how long is it?Longer than the tower!But that's just a fairy tale. The Guinness World Record holder with the longest hair is more than 2 meters long. I don't know how long such long hair will last!How long can human hair grow every day?
Human hair grows every day, and new hair grows on the human scalp every day.The number of new hairs on the human scalp every day is 50 to 60. As for how many hairs grow, it mainly depends on the number of hair follicles on our hair.Each hair follicle can grow 2 to 3 hairs, and the longest growth cycle of each hair is 10 years.

People go to the barber shop to get their hair trimmed regularly, partly because the trimmed hair looks good, and secondly because the hair grows every day, and it will make people feel messy if they don't trim it.Scientists have discovered after experiments that human hair can grow 0.3 to 0.4 centimeters in length every day. In this way, human hair will grow about 1 centimeter in a month.This number is actually not very accurate. A person's hair will not grow so much every month, but will grow according to the person's physical condition.In healthy normal people, the hair growth rate will also maintain a normal state, but if there is a disease in the body, the hair growth rate will also slow down.

I mentioned earlier that people grow new hair every day. Some people will ask, since new hairs appear on people's heads every day, why don't they see more and more hair?In fact, people grow new hair every day on their heads, but they also lose some old hair, so that the number of hair can be maintained.Under normal circumstances, each person will lose about 100 hairs per day. If the amount of hair loss exceeds this limit, it means that you need to take good care of your hair to prevent yourself from becoming "Mediterranean" in the future.

The final word: Although our hair grows a little every day, the speed is very slow, and once the hair is damaged, it is almost impossible to restore it, so everyone must take care of their hair.

*Where does the snot usually hide?
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Every time I catch a cold, the most irritating thing is the snot. The nose is so big, but the snot doesn’t seem to be wiped clean. After blowing, it comes back again. Where is the snot hiding?” How could the number be so astonishing?

In fact, the producer of nasal mucus is a layer of mucous membrane in our nostrils. The mucus that we usually flow out of our nostrils is constantly produced by these mucous membranes.

When people have a cold, viruses and bacteria continue to make trouble in our nostrils, and the poor nasal mucosa will cause inflammation.When the nasal mucosa is congested and swollen, mucus will flow out of the nostrils little by little.Some people may ask, since the nasal mucosa is invaded by bacteria and viruses when people have a cold, people will have a runny nose, so why do they also have a runny nose when they cry?
There is a special channel between the human nose and the eyes. When people cry, part of the tears will gradually flow into the nose along this channel, and the snot is formed in this way.It is precisely because there is this channel between people's eyes and nose, so when people have a cold, after nasal congestion occurs, the nose often feels sore and swollen, and the eyes also feel this way, and it stimulates the lacrimal gland, resulting in When people have a cold, they often have runny nose and tears.It's just that the snot that people flow out at this time is different from the sticky snot. The snot that people flow out at this time is often very thin, just like tears.

The final word: the human nose and eyes are connected, so when people have a cold, they often feel uncomfortable in the eyes; or when the eyes are uncomfortable, the nose will also respond.

*Why does the skin wrinkle after soaking in water for a long time?

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I believe everyone has had such an experience. When our hands stay in the water for a long time, such as swimming, washing clothes, bathing, etc., when we take our hands out of the water, we will find that the skin becomes wrinkled. Why?

Human fingers have been soaked in water for a long time, and the position of the finger pulp is prone to wrinkling, which is mainly caused by the swelling of the stratum corneum cells on the fingers.The cells are desperately absorbing water, and all of them swell, but there is only a little space, and there is still some room left, but everyone is "fat", and the space is obviously not enough, so they are crowded together wrinkled.

Our skin is divided into 3 layers, namely epidermis, dermis and subcutaneous tissue.The cells of the human epidermis will continue to grow. When new cells appear, the old cells will die and form the surface keratinocytes.Wrinkling occurs after human skin absorbs water, mainly in the stratum corneum of human epidermis.

The stratum corneum of the human epidermis has a strong water absorption function, and the corneocytes contain a large number of proteins, which play a role in water absorption.The stratum corneum of the human body is like the protective film of the human body, the keratinized cells are like the coat of the protective film, and the lipid is like the core of the protective film.Among them, the role of lipids can connect all the cells of the human body, which can well block the invasion of moisture to the skin.

With this layer of barriers, if water wants to enter the human body, it must break through this layer of barriers and gradually enter the body.Therefore, when human skin is soaked in blisters for a long time, it will become swollen, but because the outer skin has a good blocking effect, the invasion of water can only make the outer cells swell, while the inner cells are still Keep it in a relatively small state, so wrinkles will form.

The final word: The reason why the skin wrinkles after soaking in blisters for a long time is that the stratum corneum, which has amazing water absorption capacity, absorbs a lot of water in the water, which makes the outer skin cells swell, and the difference between the inner and outer cells makes the skin wrinkle.

*Why do people get goosebumps?
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There are many small pimples hidden under our skin. These small pimples are usually well hidden, and they will only pop out when the cold wind blows or when we are frightened.These small bumps have a very vivid name called "goose bumps".Why do people get goosebumps?

Human skin is covered with fine hairs, and there is a tissue called arrector pili muscle under the sweat pores. The main function of this muscle tissue is to control the movement of fine hairs.When the human skin encounters cold air, the surface of the skin will be the first to sense the temperature change, and therefore will transmit this cold information to the human brain in the first time.The human brain will send an order to the body to shrink the sweat pores, so when all the sweat pores shrink, the contracted arrector pili muscles will also form small bumps.The reason why people shrink pores immediately is to prevent the loss of heat in the body, and "goosebumps" are actually a kind of self-defense reaction of people.

When people are frightened, it will also cause people's self-defense reaction, so people will also have goosebumps reaction.When a person relaxes, the muscles will also be in a relaxed state, and the arrector pili muscles will also relax, allowing the dermis on the skin to recover its elasticity, and the hair will return to its original position.

The activity of the arrector pili muscle is mainly controlled by the adrenaline and sympathetic nerves of the human body, so once a person is excited or afraid, the arrector pili muscle will immediately contract, and the hair will stand upright. This is what is meant by the so-called creepy .

The final word: there are arrector pili muscles on the surface of the skin, and the arrector pili muscles are usually hidden under the pores in a soothing state, but once the arrector pili muscles contract, small bumps will form, that is, goose bumps.A sudden drop in body surface temperature or sympathetic nerve activation can cause goose bumps.

*Why do people shed tears when they are happy?

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It's okay to cry twice when you're sad, but why do people shed tears when they're very happy?Why is there "crying with joy"?

In fact, not only do we cry when we are happy, but we also cry when we are scratched.In fact, human tears are not only present when we are sad, but always exist on the surface of our eyeballs.The human body secretes tears all the time, but the tears do not flow out of the eye sockets, but flow on the surface of our eyeballs.

It's just that under normal circumstances, the amount of tears secreted by the human body is very small, and these small amounts of tears will only be secreted along the eyeball and the inner side of the eyelids. At best, they can only be used as a "lubricant" and not enough to flow down.So we usually don't shed tears in our eye sockets at will. For this reason, it is very normal for people not to feel the existence of tears.

Our eyes go through the process of closing and opening eyes every day. I believe many people will doubt that people close and open their eyes frequently. Why do tears still not fall easily?In fact, there is a sewer in our eyes that can absorb tears. This sewer is the nasolacrimal duct.When a person closes and blinks, excess tears flow into the nasolacrimal duct.The nasolacrimal duct leads to our nose, where excess tears flow.

When people are happy, the pressure in the nasal cavity will also increase. At this time, excess tears cannot enter the nasolacrimal duct. In addition, when people are happy, their eyelids will be closed tightly, and tears will be released under pressure. Will come out of the eye socket.

The final word: There are tears every day, but they just don't flow.Whether it is sadness or joy, as long as you put a little pressure on your eyes, tears will flow down, and it has nothing to do with emotions.

*What kind of experience is it to laugh until your stomach hurts?
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Whether we hear a funny joke or see a witty story, we all laugh out loud. Those with a low laugh point can even lean forward and back, laughing until their stomach hurts.But what kind of experience is it to laugh until your stomach hurts?

When people laugh out loud, the mouth opens wide, the rhythm of breathing is disrupted, and a large amount of air is sucked in. The lungs expand and gradually push down on the diaphragm.

At the same time, when a person laughs, they also contract their abdominal muscles and form a force that pushes up the diaphragm.The lungs push down the diaphragm, while the abdominal muscles push up the diaphragm. The two forces are constantly competing, and neither will let the other. This can make the diaphragm in the middle complain endlessly, and the diaphragm is likely to become a "victim". The muscles of the diaphragm appear Cramps, and therefore stomach pains.

In fact, it is not only the problem of stomach pain when people laugh, but also when people yell, the main cause of stomach pain is the diaphragm, the diaphragm is not good, and the stomach Just forget about comfort.

In fact, people laughing often is good for their health, but everything needs to be moderate, and you must not laugh too much.Studies have shown that people who laugh too much can dislocate their jaws.

Stomach pain caused by laughter does not need to see a doctor. People with stomach pain can try to adjust their breathing speed, make their breathing as slow as possible, and take deep breaths, so as to relieve the symptoms of stomach pain.If you often laugh until your stomach hurts, you might as well do more sit-ups at ordinary times, which can also effectively prevent the occurrence of laughing until your stomach hurts.

The final word: As the saying goes, "a smile will last ten years", so a good laugh is good for human health. Laughing often can improve blood vessel function and strengthen the body's immunity, but remember not to laugh too much to avoid stomach problems. pain.

*Why is human hair not easy to rot?

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In archaeological programs, many newly unearthed remains of ancient people often have hair in addition to dense white bones.It's fine to keep the bones, but why is the hair so strong?Why is human hair not easy to rot?
Human hair is rich in keratin, and keratin is "stubborn"!It's not that simple to make this thing submissive.Keratin is rich in cystine, which will make the structure of keratin more compact, and also make the substance containing keratin neither easy to be degraded by protease, nor soluble in water.

Keratin contains different amounts of sulfur. According to the amount of sulfur, it can be classified into soft keratin and hard keratin.Among them, the sulfur content in soft keratin is relatively small, so the substance containing soft keratin will be very soft. This keratin mainly exists in human skin.The sulfur content in hard keratin is relatively high, so substances containing hard keratin are usually harder, such as nails, hair, animal feathers, horns, all contain this substance, so hair is less perishable than other substances .

But keratin isn't invincible when even the stone nods.They are not degraded by most proteases, but they are not indestructible either.All substances in the world have mutually restraining substances, and only in this way can balance be maintained.In nature, there is a microorganism that can secrete proteolytic enzymes that can degrade keratin.When keratin meets this substance, it will be degraded naturally.Although such microorganisms exist in nature, people's hair is rarely in contact with this substance, so naturally it is not easy to rot.

The final word: After research, scientists have found that some fungi and actinomycetes also have these microorganisms with the ability to decompose keratin, so when people have fungi on their scalps, their hair quality will also be damaged.

*Is ice compress reliable for weight loss?
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Losing weight can be said to be a woman's lifelong career. Even if she doesn't really lose weight, she will keep these two words on her lips.There are also endless ways to lose weight. Recently, the "ice compress weight loss method" has become popular on the Internet. Is this method reliable?
The rumored ice-pack diet involves two types of body fat: one is white fat; the other is brown fat.These two kinds of fats are real in the human body, so the concept of ice weight loss is also correct.Ice compress to lose weight is mainly to use cold to stimulate people's white fat, because white fat plays a role of storage, once these white fat is stimulated by cold, it will speed up the metabolism, thus playing the role of weight loss.Looking at it this way, this weight loss seems to make sense, but it is not nonsense.

But in fact, after white fat is stimulated, it will be converted into brown fat instead of really disappearing.Therefore, the stimulation of cold does not have a metabolic effect on the fat in the human body. The fat is just "wearing a vest" and does not disappear from the body, so the method of ice compress to lose weight has no real effect , It also fails to achieve the real weight loss goal.

In addition, scientists have also conducted experiments, which have proved that under the stimulation of cold, the tissue metabolism rate of fat in obese people does not increase at all. That is to say, for obese people, ice compresses have no effect at all. .

In fact, there is no scientific reason to apply ice to lose weight, and for women, ice to lose weight is not a good way to lose weight.Women's bodies are most afraid of being invaded by cold air. Once the cold air gathers in women's bodies, they will suffer from various diseases, the most common of which are gynecological diseases. Therefore, it is recommended that you do not easily try ice compresses to lose weight.

The final word: Ice compresses are not reliable for weight loss, and it will also affect your health. The best way to lose weight is to "keep your mouth shut and open your legs", properly adjust your diet, and strengthen your exercise, so that you can lose weight in a healthy and healthy way. Thin yourself.

* How much skin does a person shed in a lifetime?

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Snakes shed their skin periodically, and once they shed, they shed the entire skin together.Although people are also "molting", they are not as direct as snakes.A snake sheds its skin in a few months, so how much skin will a person shed in a lifetime?

The human body will grow new skin cells every day, and the number of new skin cells may be a bit surprising. Its number is 100 million to 200 million per day.While these brand new skin cells come as a surprise, the number of skin cells that the body loses every day is equally astounding.The number of human cells that die every day is 100 million to 200 million, which means that the number of new skin cells that the human body grows every day is actually similar to the number of dead skin cells. The new skin cells are just to replace those dead skin cells .

So why do so many skin cells "go to death" every day?This is mainly due to the fact that the clothes that people wear every day will rub back and forth with the human skin. During the friction process, skin cells will die.

In addition, when people take a bath, they often rub out a lot of "mud".The "mud" from these scrubs is actually dead skin cells.

People have to face the regeneration and death of skin cells every day in their life, so how much skin will they shed in their life?Some people have done statistics and found that a person will shed about 18 kilograms of skin in his life.The skin comes off in flakes, so it's often overlooked.

The final word: Human skin will fall off every day, and in about 27 days, all human skin will fall off.New skin cells replace dead skin cells, creating a new skin coat for the body.

* How long does it take for a person to fall asleep?
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Knowledge: ★★★★★

Interesting: ★★★★
People need to rest every day, and sleep is the best way to rest. Sometimes people often complain that they have insomnia again, or some people will give people the impression of "falling asleep", so how long does it take for a normal person to recover? able to sleep?
During the process of falling asleep, people's brain waves will continue to change, and this change is a regular change.The changes in brain waves can be divided into four stages, namely: falling asleep stage, light sleep stage, moderate sleep stage and deep sleep stage.

There are two types of sleep: one is slow-wave sleep; the other is fast-wave sleep.Among them, slow wave sleep needs to go through the above four stages of sleep, and the time required for these four stages is about 1.5 hours.At this time, the muscle tension of the human body will gradually weaken, and the parasympathetic nerve will become excited. Generally, people in slow wave sleep will not dream.In this sleep state, the human body will secrete more growth hormone, so it is of great help to restore physical strength.The fast wave sleep occurs about 1.5 hours after people fall asleep. After the slow wave sleep begins, people return to the state of light sleep again. People in this sleep state have faster heartbeat and faster breathing. Becoming unsteady and dreamy, but this kind of sleep is of great help to restore brain power.

Human sleep needs to go through the above four stages, and the four stages take 1.5 hours, so the time for people to enter deep sleep is actually very short. In each sleep cycle, the time occupied by deep sleep It is only about 30 minutes, and an adult will cycle about 4 times a night. In this way, the time of deep sleep for an adult is only two hours a day.

The final word: It takes at least an hour and a half to enter deep sleep, and the time of deep sleep will not exceed 30 minutes. Although deep sleep is hard-won, even if it is not deep sleep, human physical and mental power can also be used during sleep. be repaired in.

* Can you open your eyes when you sneeze?

Practicality: ★★★

Knowledge: ★★★★
Interesting: ★★★

When our nose feels itchy, we will suddenly sneeze, and when people sneeze, they often close their eyes tightly. Can't we open our eyes when we sneeze?

In fact, it is really impossible to open your eyes when you sneeze, because when a person sneezes, there will be an impact force, and this impact force is very strong.After research, it was found that when a person sneezes, the facial muscles will contract, and this contraction process is not controlled by the human brain, but caused by the natural conditioned reflex of the person.When a person's facial muscles contract, the person's eyes are naturally closed.

I mentioned before that when you sneeze, you need to form an impact force, and the main function of this impact force is to eject the foreign matter in the nostrils.When a person sneezes, the speed of the torrent sprayed from the nostrils can reach 150 kilometers per hour.In the face of this powerful impact, people will naturally react instinctively, that is to close their eyes tightly.If you don't close your eyes tightly when you sneeze, the pressure from the sneeze can cause serious damage to the lacrimal ducts and even your optic nerve.

The closing of human eyelids is mainly completed by the ring-shaped orbicularis oculi and the fan-shaped distribution of the levator muscles. The instruction to close the eyes is sent by the human brain, and then the nerves are used to control the contraction of the orbicularis oculi muscles. Only then can the eyelids be closed.Conversely, if the human brain issues an order to contract the levator muscles, then the eyelids will open.

The final word: Closing the eyes when sneezing is an instinctive reaction of people, and people cannot control it. This can effectively ensure that the eyesight will not be damaged.

*Do the eyes grow again after birth?

Practicality: ★★★

Knowledge: ★★★

Interesting: ★★★★★

Everyone is just a little baby when they are born, but as they grow older, they will grow taller and taller, and their organs will also grow, but will the eyes grow together?

When a person is born, the function of the eyeball has not yet matured, and the size of the eyeball will increase with age.Therefore, it can be said with certainty that after a person is born, the eyes will indeed grow again.However, there is a certain limit to the size of the eyeball, and it will not grow indefinitely. After reaching a certain level, the size of the eyeball will no longer change.

But the "size" of the eyes is not necessarily only related to the size of the eyeball, but also has a lot to do with the skin around the eyes.Some people have single eyelids, and the eyes look very small, while some people have double eyelids, and the eyes look very big, and they are very energetic. Because of this, so many beauty lovers rush to the hospital to cut their double eyelids. , just to make the eyes look bigger.

People's single eyelid and double eyelid are related to genetics. If one parent has double eyelid, the probability of the child's double eyelid is very high.In addition, some people's parents' eyes are not very big, but the child's eyes are very large, which is related to the laxity and tightness of the skin around the eyes.

As people grow older, the skin around the eyes is also gradually changing. When the skin around the eyes is constantly changing, some people who originally had single eyelids will gradually change into double eyelids.The eyes of people with double eyelids look bigger than ordinary people, but not because their eyeballs are bigger, but because the skin around the eyes has changed.Furthermore, the size of the eyeball has nothing to do with the size of the eye. Everyone's eyeball is basically the same size.

The final word: Eyeballs will continue to grow after birth, but after a certain level, there will be no change.The size of a person's eyes has nothing to do with the eyeball, but with the laxity of the skin around the eyes. If you want to make your eyes bigger, you need to start with the skin around the eyes.

*Does "multiple personality" really exist?

Practicality: ★★★

Knowledge: ★★★★★

Interesting: ★★★★★

Friends who like to read detective novels must have heard the term "multiple personalities". In detective novels, the behavior of some criminals is often described as multiple personalities.Do multiple personalities really exist in real life?

After research, people found that multiple personalities are real, and a multiple personality patient in the United States has as many as 23 hidden personalities.Multiple personality means that a person has more than two personalities at the same time, and these personalities will be expressed at different times. Although this phenomenon seems unbelievable, it is real.

Psychiatrists have found after research that when some people's personal consciousness, memory, identity and perception of the surrounding environment are destroyed, they will feel troubled about their existing life, and this trouble is often not caused by physical changes, but many spiritual changes.

Generally speaking, people with multiple personalities do not have coherent memory, and most of them have temporary amnesia.Some people's multiple personalities are not yet coherent, or even able to express a complete personality.Maybe many people think that the phenomenon of multiple personalities is far away from their real life, and generally exists in novels or TV dramas, but in fact multiple personalities are very close to people's lives.For example, some people often cannot tell whether it is a dream or real life, and some people like to talk to themselves. These are people with multiple personality tendencies.

In the folk, there are also many people who have the so-called "ghost possession". This kind of superstitious thing is actually a manifestation of multiple personalities.From a scientific point of view, ghosts and gods do not exist in the world. The reason why people behave differently than usual is not because of ghosts and gods. Maybe it is because they hide their personality and escape the strict defense of the master personality and run out for a stroll.

The final word: Nowadays, people are still exploring and researching the topic of multiple personality. This disease has always been a topic worthy of in-depth exploration in psychiatry.

* Eating boogers can enhance immunity, is it true?
Practicality: ★★★★
Knowledge: ★★★

Interesting: ★★★★★

When I was young, I heard the elders said that eating earwax will make you dumb. Of course, this is only because the elders said so because they were afraid that children would eat things without understanding, but now there is a saying that "eating boogers can increase immunity"!This world is already messy, and even boogers have become a baby that can improve immunity?
This statement was first put forward by a thoracic doctor in Austria. The doctor believed that the human nasal cavity has the function of filtering in the human immune system. When the outside air flows into the body through the nostrils, some bacteria will be released. will be filtered out.And these filtered bacteria will exist in human boogers. When people eat these boogers with a variety of bacteria, they will also have the effect of enhancing immunity after being absorbed by the small intestine.At first hearing this statement, it feels a bit like fighting poison with poison. Could it be that there is really a way?

In fact, the statement that eating boogers can enhance human immunity was not only proposed by Austrian doctors, but also by some scholars.After repeated research, people have found that this statement is not reliable at all, and it does not have any practicality.

Human boogers contain a large number of viruses and bacteria. The above-mentioned theory believes that after these viruses and bacteria contained in boogers are eaten by people, antigenic information will be captured by human tonsils. At the same time, many immune response antibodies.In fact, this theory has not been effectively confirmed, and boogers are actually harmful substances produced by the filtration of nasal mucosa and nasal hair. If these harmful substances are eaten in the stomach, it is definitely not good for the body after thinking about it.

If you really believe this statement and eat boogers in order to improve your immunity, then you are really showing off your head. What needs to be improved is not immunity, but IQ.

The final word: the human nasal mucous membrane contains various immune cells, and boogers also contain a variety of microorganisms, but these microorganisms cannot help us improve immunity, and even if we eat boogers, they will be eliminated by gastric acid in the stomach It will be completely clean, and it will not reach the small intestine at all, let alone the so-called function.

*Titanium ring can prevent cervical spondylosis, is it true?

Practicality: ★★★★
Knowledge: ★★★★
Interesting: ★★★

I don't know when it became popular to wear collars, and this collar is called "titanium ring".It is said that regular wearing of titanium rings can effectively prevent cervical spondylosis.This "titanium ring" has killed countless boys and girls and uncles and aunts in seconds. Can this thing really prevent cervical spondylosis as it is said in the legend?
Titanium rings are actually imported products. Their "motherland" is Japan. Even the titanium rings currently on the market are equipped with manuals that are basically all in Japanese. Young people may be able to figure out a little bit of knowledge and basically understand the instructions. However, when uncles and aunts see the instruction manual of the titanium ring, it is basically the same as seeing the "Book of Heaven". They do not understand what this thing is. The ring is a high-tech product that is at the forefront of technology. It is called a "tall" when worn around the neck!So many people will scramble to buy it.

In fact, through testing, we found that there is no difference in the myoelectric signals sent by the muscles when wearing a titanium ring and not wearing a titanium ring.That is to say, the titanium ring will not have any impact on human myoelectricity, and people will not feel labor-saving after wearing the titanium ring.The reason why some people who have worn titanium rings have always firmly believed that titanium rings can prevent cervical spondylosis is because they have strong psychological hints that titanium rings are useful, so they have such a psychology.

When people wear titanium rings, they often have good psychological expectations, thinking that wearing them will help the health of the cervical spine, and then they will pay special attention to the maintenance of the cervical spine when wearing them, and get rid of some bad habits in the past. I feel that it helps to protect the cervical spine.

The color of the titanium ring is silvery white and has a metallic luster, so it is liked by people, but in fact it has nothing to do with the health care function.The titanium ring is just a simple decoration, consumers should not easily listen to the misleading businessmen.

The final word: Through the above introduction, we can understand that the titanium ring actually has no health care effect at all. If you want to keep your cervical spine healthy, you have to make changes in your daily life habits and maintain good living habits in order to have a healthy body. Body.

*How difficult is it to steal a kidney?

Practicality: ★★★★
Knowledge: ★★★★
Interesting: ★★★★★

With the popularity of Apple mobile phones in China, the name of "kidney machine" has gradually become famous, and "selling kidney" has become a word of mouth for many young people.However, some lawbreakers actually have the idea of ​​stealing kidneys and selling them to make money. There have been many related reports in the news. How feasible is "stealing a kidney"?

I would like to remind everyone here that our country is a society ruled by law, and any illegal behavior will be punished by law. If you want to do illegal things, first see if you are mentally prepared to face the inevitable punishment.

Let's get down to business, even if the thief is brave enough, other people's kidneys are not so easy to steal.If you want to steal a kidney from the victim, you must first give the victim general anesthesia, and general anesthesia requires professional equipment, drugs, ventilators, and some first-aid drugs, etc. .

Even if all these equipments are readily available, it is nothing more than being able to steal other people's kidneys from other people's bodies.But what to do with the stolen kidney?Who will install the severed kidney?You must know that performing a kidney transplant is not as simple as replacing parts for a machine, just install it and you're done.Before doing a kidney transplant, it is first necessary to match the person who provided the kidney with the person who received the transplanted kidney. Only after the two people are matched successfully can the transplant operation be performed.Once the matching is unsuccessful, the transplant operation cannot be performed.

In addition, after the kidney is removed, due to the loss of blood supply and oxygen supply, a kidney can only survive for a few hours. After this survival time, the stolen kidney will die.Once the kidney is necrotic, it is equivalent to an ordinary "kidney" and has no use value.

It can be seen that stealing a kidney is not an easy task, but a down-to-earth "technical job". Therefore, most of the news about stolen kidneys is for attracting people's attention.

The final word: Although it is not easy to steal a kidney, kidney stealing has really happened in life.In order to prevent your kidneys from being coveted by criminals, it is recommended that you go to a regular hospital for a physical examination, and don't easily believe in such a "good thing" as a free physical examination.

* Do muscles have memory?

Practicality: ★★★

Knowledge: ★★★★★

Interesting: ★★★★
It is nothing unusual to say that the brain has memory. If the brain has no memory, there must be something wrong and it needs to be cured!But I heard that muscles also have memory, is this true or false?

This can't be more true. Muscles really have memory.The so-called muscle memory is actually what people call "action stereotyping", and academically it is called "power stereotyping".Dynamic stereotyping is actually the same as conditioned reflex. If people do the same action for a long time, such as pulling ears, touching lips, or scratching hair, these are all people's dynamic stereotypes.These movements belong to the small movements that people usually develop. People will make such movements without knowing it. People's brains will not deliberately control people to do such movements, but in fact people often make such movements. , This is actually caused by human muscle memory.

Once the motivation is formed, people will involuntarily repeat such actions. When doing such actions, they don't need to consume their brain and physical energy, so they will not affect people's lives.Generally speaking, the so-called muscle memory is a living habit that people develop in their lives.Sometimes people often make some small movements subconsciously when they are nervous. These small movements may not be noticed by themselves, and these movements are muscle memory under conditioned reflex.

In addition to some small movements in life that belong to the performance of muscle memory, some motor skills will also cultivate muscle memory.For example, people often practice a certain kind of movement, and gradually this kind of movement will turn into an automatic phenomenon, and people can complete these movements unconsciously, which is also an obvious manifestation of muscle memory.

The final word: Muscle memory is the actions people make subconsciously, and everyone has this kind of muscle memory.For example, our writing posture, walking posture and small movements in life are all typical muscle memory phenomena.

*What does the "nine-headed body" beauties mean?
Practicality: ★★
Knowledge: ★★★★
Interesting: ★★★★★

When it comes to the big beauty Wu Peici, the first thing that people think of is the "nine-headed body" beauty. Although we always call "nine-headed body" and "nine-headed body", we probably know what it means to be a big beauty, but What is the meaning of this "nine-headed body" beauty?

"Nine-headed body" actually refers to the proportion of the human body, using the length of the human head as a basic unit.Under normal circumstances, the human body of a normal person can be divided into 7 basic units, of which one is occupied by the head, two are above the waist, one is between the waist and the buttocks, and three are below the buttocks.Friends who like to read comics must have seen the beautiful girls in comics. Their figures are all "nine-headed"!The slenderness of the comic characters is to make the composition of the comics look more beautiful, and also to increase the beauty of the characters.The proportions of the human body in comics are only an idealized proportion of the human body. In real life, there are very few women with the proportion of "nine heads and body".

Among normal people, there are generally more women in Europe and the United States who have the proportion of "eight-headed body", but in Asia, there are very few people who want to find such a proportion, let alone "nine-headed body".Because the "nine-headed body" proportion of the figure is very good-looking both in clothes and on camera, the standard of "nine-headed body" has gradually become the standard for selecting models.The models we see on the runway are often tall and slender, and they often have perfect proportions of "nine heads and bodies".Nowadays, young models who roam around Hong Kong and other places are not considered real models because they are not tall enough, their proportions are not good enough, and they don’t have enough "nine heads", so they are called young models.

The final word: "nine-headed" beauties refer to those beauties who are tall enough and have perfect proportions. Not all tall beauties can become "nine-headed" beauties.

*Is it true that people who stutter don't stutter when they sing?

Practicality: ★★★

Knowledge: ★★★★
Interesting: ★★★★★

People who stutter often feel ashamed to speak when there are many people, and feel that their stuttering will bring a lot of embarrassment, but people who stutter often stop stuttering when they sing. This seemingly miraculous phenomenon What is the situation?

Why do people who stutter stutter?The main reason is that we usually speak impromptu, we say whatever comes to mind, there is no time for us to prepare in advance, and we don’t need people to practice, so people who stutter may tie knots as they speak.But singing is different. Singing has fixed lyrics. If you want to learn a song, you must listen and practice it repeatedly, so that you can learn a song.When people sing, they tend to memorize the lyrics in the song. When they are familiar with the lyrics, even if they stutter, they will become very smooth when singing the song, because it may not be too late to stutter, and they are familiar with it by heart. The lyrics of the words have already blurted out.

In fact, this truth is not difficult to understand, just like we usually talk.There are many different dialects in China's vast territory. People who can't speak standard Mandarin can sing Chinese songs with correct accents and no local accents at all, but when it comes to speaking, they are completely A dialect with a strong local accent.That is to say, after repeated practice, what people say will be completely normal.The same is true for people who stutter, they will never hear that they stutter.

The vast majority of people with stuttering problems have great psychological pressure when speaking, and the greater the psychological pressure, the more serious the stuttering situation will be. When the body and mind are relaxed, the stuttering situation will often lighten.People who stutter don't stutter too much when they talk to people they are familiar with, but when they meet strangers, they often show that they can't speak.

The final word: People who stutter must not be anxious when speaking, try to speak slowly and relax, and don't pay too much attention to their stuttering when they speak. The more you care, the more likely it will be counterproductive.

(End of this chapter)