Why do people cry when they are sad? Thank you, and God bless you. Humans are the only members who can cry. Tears are a simple behavior that people are born with. No one can learn. It is as instinctive as heart beating and kidney excretion, as spontaneous as sighing and sneezing. So, why do people cry? What effect does tears have on human body? What's the point? This seemingly simple question has long puzzled researchers. Charles Darwin, the founder of the theory of evolution, once speculated that tears are a kind of "relic" of evolution, which has nothing to do with the survival competition in the process of evolution. When crying, the microvessels around the eyes will be congested, while the small muscles will contract to protect the eyes, causing the lacrimal gland to secrete tears. Darwin thought that for the human body. Tears are meaningless by-products. Achille Montago, an American anthropologist, holds the opposite view to Darwin. He believes that shedding tears is beneficial to the human body, which has a certain influence in evolution, so it can be passed down from generation to generation through natural selection. Human tears are the result of the survival of the fittest. For example, he said: tears contain lysozyme, which is a self-defense substance of human body and can protect nasopharyngeal mucosa from bacterial infection. Observation shows that dry crying without tears is easy to dry nasopharyngeal mucosa and make it infected. Today, more and more scholars agree with montague that tears may do some good to human body. William Foley, a psychologist at the University of Minnesota in the United States, made a comprehensive study of tears from the perspective of psychology and biochemistry. He divided tears into reflective tears (such as those caused by onions) and emotional tears. In five years, William Foley studied thousands of tearful "volunteers". His statistics show that in a month, men rarely cry more than 7 times, while women cry more than 30 times. Most subjects cried 12 minutes at a time, and occasionally cried 1 hour for 40 minutes. From 7: 00 p.m. to 10, gathering with family and friends or watching TV is the time with the highest frequency of emotional tears. According to private prosecution, about 45% of men often don't cry once a month. Only 6% of women may not cry once a month. 40% of women will cry because of interpersonal relationships such as quarrels, marriage and love. Only 36% of men shed tears because of interpersonal relationships, while the proportion of tears for movies, TV, books and unexplained depression is significantly higher than that of women. Foley collected the tears of the subjects with a special small test tube, and analyzed and tested the tear samples. He found that emotional tears contain more protein, while reflective tears contain more protein. In these complicated protein, there is a chemical that may be similar to an analgesic. According to this result, Frey speculated that tears may be a kind of excretion behavior. It can eliminate biochemical toxins caused and accumulated by emotional stress. If these toxins are not excreted through tears and remain in the body, they will be harmful to health. Emotional tears excrete toxins, restore the psychological and physiological balance of the tearer, and are beneficial to health. But what toxin is excreted through tears? What are the different functions of protein contained in tears? How are they produced and how are they metabolized? I don't even know the benefits myself. Understanding these problems will help people to judge whether Frey's theory is correct. So, why do only humans among primates shed tears? For this, researchers seem to be unable to find a reasonable explanation for a long time. 1960, the British anthropologist Professor Alice Hardy put forward a sensational sea ape hypothesis. According to the previous theory of human origin, the stage of human birth is forest and grassland. Hardy pointed out that in the history of human evolution, there were millions of years of aquatic sea apes. This special stage has left a deep impression on mankind so far, leaving traces of anatomy and physiology; These characteristics are not found in other terrestrial primates, but also in marine animals such as seals, sea lions and seabirds. For example, human lacrimal glands secrete tears, which contain about 0.9% salt. This special physiological phenomenon is also the characteristic of marine animals, and it is the trace left on the human body in the ancient sea ape stage. It is impossible for animals that have evolved and developed on salt-deficient land to produce such physiological characteristics of "salt consumption" Professor Hardy's sea ape hypothesis was once considered as "whimsical" when it was first put forward. However, with the passage of time, this assumption has not been refuted. On the contrary, more and more researchers believe this hypothesis. From 65438 to 0983, Professor Billy Tong Dan, a biologist at the University of Melbourne, Australia, studied and compared the physiological mechanism of controlling salt balance between humans and other mammals. His research also suggested that human tears may originate from the salt secretion mechanism of lacrimal gland of marine animals. The sea ape theory may be the only theory that can explain the origin of human tears at present. However, this theory still lacks reliable fossil basis. It has not been accepted by most anthropologists. As a hypothesis of human origin and evolution, the sea ape theory needs to be further improved. How do human tears originate? Why do people cry? Although researchers have explored this from different angles, these problems are still scientific mysteries. It can be said that the serious research on the behavior of tears has just begun. To solve the secret of tears requires the joint efforts of researchers from all walks of life. So what's the use of tears? Everyone's eyes have a "small factory" that makes tears. People name it "lacrimal gland". Every day, the lacrimal gland is constantly making tears. Tears are of great use. When blinking, tears are evenly applied to the eyeball to moisten the eyeball. Tears can also wash away the dirt on the eyeball surface, keep the eyeball clean and kill bacteria. Therefore, it's okay to shed some tears occasionally, whether it's a man or a woman, it's a way to relieve stress and mood.

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Why do you cry when you are sad? Thank you, and God bless you. Why are you sad? Because you put your heart into it, you paid, but you got the opposite in return. It doesn't mean that as long as you pay with your heart, you will definitely get something back. If you manage with your heart and devote yourself wholeheartedly, your efforts will not be good, and everything you have paid will be wasted, so you will be sad, so you will cry. On the other hand, it depends on how sad you are and how strong your tolerance is. Then you have good endurance, and eventually you will cry. This is human physiological instinct, which is beyond your control. The reverse is the same ~!

Please accept it, thank you!

Why do people always become literary when they are sad? Thank you, and God bless you. When people are sad, they want to express their inner pain, so they will unconsciously recall some classic sentences. Although vague, it will unconsciously become your own words and slip out, which is a bit like hypnosis.

Why do people cry when they are sad? Humans are the only members who can cry. Tears are a simple behavior that people are born with. No one can learn. It is as instinctive as heart beating and kidney excretion, as spontaneous as sighing and sneezing. So, why do people cry? What effect does tears have on human body? What's the point? This seemingly simple question has long puzzled researchers. Charles Darwin, the founder of the theory of evolution, once speculated that tears are a kind of "relic" of evolution, which has nothing to do with the survival competition in the process of evolution. When crying, the microvessels around the eyes will be congested, while the small muscles will contract to protect the eyes, causing the lacrimal gland to secrete tears. Darwin thought that for the human body. Tears are meaningless by-products. Achille Montago, an American anthropologist, holds the opposite view to Darwin. He believes that shedding tears is beneficial to the human body, which has a certain influence in evolution, so it can be passed down from generation to generation through natural selection. Human tears are the result of the survival of the fittest. For example, he said: tears contain lysozyme, which is a self-defense substance of human body and can protect nasopharyngeal mucosa from bacterial infection. Observation shows that dry crying without tears is easy to dry nasopharyngeal mucosa and make it infected. Today, more and more scholars agree with montague that tears may do some good to human body. William Foley, a psychologist at the University of Minnesota in the United States, made a comprehensive study of tears from the perspective of psychology and biochemistry. He divided tears into reflective tears (such as those caused by onions) and emotional tears. In five years, William Foley studied thousands of tearful "volunteers". His statistics show that in a month, men rarely cry more than 7 times, while women cry more than 30 times. Most subjects cried 12 minutes at a time, and occasionally cried 1 hour for 40 minutes. From 7: 00 p.m. to 10, gathering with family and friends or watching TV is the time with the highest frequency of emotional tears. According to private prosecution, about 45% of men often don't cry once a month. Only 6% of women may not cry once a month. 40% of women will cry because of interpersonal relationships such as quarrels, marriage and love. Only 36% of men shed tears because of interpersonal relationships, while the proportion of tears for movies, TV, books and unexplained depression is significantly higher than that of women. Foley collected the tears of the subjects with a special small test tube, and analyzed and tested the tear samples. He found that emotional tears contain more protein, while reflective tears contain more protein. In these complicated protein, there is a chemical that may be similar to an analgesic. According to this result, Frey speculated that tears may be a kind of excretion behavior. It can eliminate biochemical toxins caused and accumulated by emotional stress. If these toxins are not excreted through tears and remain in the body, they will be harmful to health. Emotional tears excrete toxins, restore the psychological and physiological balance of the tearer, and are beneficial to health. But what toxin is excreted through tears? What are the different functions of protein contained in tears? How are they produced and how are they metabolized? I don't even know the benefits myself. Understanding these problems will help people to judge whether Frey's theory is correct. So, why do only humans among primates shed tears? For this, researchers seem to be unable to find a reasonable explanation for a long time. 1960, the British anthropologist Professor Alice Hardy put forward a sensational sea ape hypothesis. According to the previous theory of human origin, the stage of human birth is forest and grassland. Hardy pointed out that in the history of human evolution, there were millions of years of aquatic sea apes. This special stage has left a deep impression on mankind so far, leaving traces of anatomy and physiology; These characteristics are not found in other terrestrial primates, but also in marine animals such as seals, sea lions and seabirds. For example, human lacrimal glands secrete tears, which contain about 0.9% salt. This special physiological phenomenon is also the characteristic of marine animals, and it is the trace left on the human body in the ancient sea ape stage. It is impossible for animals that have evolved and developed on salt-deficient land to produce such physiological characteristics of "salt consumption" Professor Hardy's sea ape hypothesis was once considered as "whimsical" when it was first put forward. However, with the passage of time, this assumption has not been refuted. On the contrary, more and more researchers believe this hypothesis. From 65438 to 0983, Professor Billy Tong Dan, a biologist at the University of Melbourne, Australia, studied and compared the physiological mechanism of controlling salt balance between humans and other mammals. His research also suggested that human tears may originate from the salt secretion mechanism of lacrimal gland of marine animals. The sea ape theory may be the only theory that can explain the origin of human tears at present. However, this theory still lacks reliable fossil basis. It has not been accepted by most anthropologists. As a hypothesis of human origin and evolution, the sea ape theory needs to be further improved. How do human tears originate? Why do people cry? Although researchers have explored this from different angles, these problems are still scientific mysteries. It can be said that the serious research on the behavior of tears has just begun. To solve the secret of tears requires the joint efforts of researchers from all walks of life. So what's the use of tears? Everyone's eyes have a "small factory" that makes tears. People name it "lacrimal gland". Every day, the lacrimal gland is constantly making tears. Tears are of great use. When blinking, tears are evenly applied to the eyeball to moisten the eyeball. Tears can also wash away the dirt on the eyeball surface, keep the eyeball clean and kill bacteria. Therefore, it's okay to shed some tears occasionally, whether it's a man or a woman, it's a way to relieve stress and mood.

Why do people cry when they are happy? When they are sad, they will cry back. The lacrimal gland is "commanded" by emotion (the emotional center of the brain). When the mood rises and falls, the lacrimal gland begins to secrete tears, so laughter also "cries" and sadness also cries!

What are some good songs? Sad thanks, God helps! Hello, MP3.SOSO.COM, a website recommended for music updates! Just pick the right songs, not many. I think songs are the best. The landlord must listen to them! (The above is super nice) Daoxiang-Jay Chou ↑ She-Long live the cuteness ↑ She-Lock the time ↑ Nanquan & Rainy Day ↑ SARA- Even if I knew I was going to meet → Wang Leehom-What happened to rock and roll → Jane Zhang → Painting Heart → Li Jiuzhe-Forget it → Top Combine-Marshmallow → ↑Genie &；; Huang Hongsheng-Love Theme = Jay Chou-Say Good Happiness = Black astringent girl &; Lollipop-bitter tea ↑ milk coffee-the longer you get, the lonelier you get ↑ (The above is super nice) Recommended pure music: (Super nice) Goodbye to the police in Purple Sky City. Forgotten angel I suffered from cold and rain in that corner. The Lonely Voice Romeo and Juliet Rain-Sad Tango Lee Hyo Ri TOC Li Xiao. Don't fall in love with him, so ice cream MC dreamed of love and danced about 30 times. Question, Sun Liu, I believe that dancing is about never saying goodbye. Listen to me, Papaya won't forget you tonight. I feel very close to you in Kuraki Mai&; Stephanie speaks for herself-Alison Krauss has a good taste, and I like candy stores very much-50 cents for this song. I believe many people have heard of it. I may be a-donna louise has a sweet voice without me-Another Eminem classic-Don't turn off the lights-Enrique Iglesi Samet. Ricardo-Green Day punk music, I like Dream Broken Avenue-Green Day Moon Shadow-Dancing Elf Orchestra yesterday was a day-jane birkin is alive because of you-Jesse McCartney is handsome and good. When you believe-Maria Kelly introduced this classic "We will rock you" in many places-the classic first song in Queen Rock: Stand second: peerless third: floorfiller fourth: sosforlove (aka: Love for help). The fifth song: hey-oh, the sixth song: OneForDaMoney, the seventh song: Ein Kleines Lied, the eighth song: la isla alizee, the ninth song: groove coverage, the tenth song: Tell me about a person, the eleventh song: human sacrifice, and the twelfth song: wet. Wet 13: Ice Age 2 14: I saw you walking in the rain 15: You won't score 16: Self-control Laura Bran 17: Be a boy 18: Dreams come true'' I saw you. I believe it will be very good. Just choose the right ones, not many. Please listen to me. Remember to add points when listening! Thank you. Have a good time listening to music!

Appointed singer: | Composer: Lyrics: After Dawn Composer: Lyrics: Lu Singing: Hugh Moonlight Composer: Huang Lyrics: Huang Qier Arranger: Hong Xinjie Singing: Hugh's Millennium Tears Singing: Tank Album: Flying Fairy TV Music: Lv Jianzhong Lyrics: Lv Jianzhong's "Always Quiet" Singing: Assange's lyrics are all omitted. These songs can be found directly in Baidu. I like many sad songs. These are just my favorites. I hope you like it:) Add a few more songs: A glimpse of the Millennium by S.H.E, Butterfly Love by Liu Yifei and Rebirth by He Jingjing.

Nice and sad. . . Millennium, love, if you go back to the past, late autumn. . I like it better.

What song is sad? Thank you for your help. The wounded song "Half Love Song", which ranks first in the Chinese list of "Wounded City", doesn't like the biggest discovery and brings its own torture.

Why do people cry when they are sad? Thank you, and God bless you. Sadness is an emotion. If you can't control it and need to show it, you will cry.