Why only humans have hair, and why do people have hair

It's just that we don't call the hair on the head of other animals hair, and the hair on the human body degenerates, and the hair on the head is left, which is called hair. Many elderly people are bald, and it should not be said that the hair will be until the end of life.

Only humans have shampoos...

Unlike humans, most mammals are covered in hair, while humans have only a few places on their bodies. But the hair on our head is thick and dense, no less than the hair on animals. In fact, a long time ago, the ancestors of human beings were also covered with hair.

Later, due to continuous evolution, the lifestyle and living environment changed, and the hair on the body also changed, and the hair on most parts gradually became shorter and thinner, and it became the current hair. Only a few parts are still long hair, and the hair is long, dense, and grows the fastest. Why is only the hair left?

The human mind is the central command of the body, responsible for directing the "work" of all parts of the body, so it is very important, and in order to protect this headquarters, the hair does not degenerate.

The reason why people have hair is because of an anti-ancient phenomenon. Moreover, the earliest human beings retained hair in the process of evolution in order to better protect the temperature of the head, so that the human body temperature could not be quickly dissipated!

Why do people have hair, because hair can protect from the wind and rain, people must have hair, hair is blood, it can protect your brain.

Human hair is the fur that has been retained during evolution, which is a very normal physical trait, and needs to be taken care of every day, washed and trimmed regularly for the sake of personal beauty.

The main function of hair is to keep warm, and since the evolution of human beings, hair has been retained all over the body to protect the temperature of the brain.

In general, people of age do not have a metabolism. Okay, so um, love to lose hair um, and their bodies also have a certain relationship with staying up late on fire um, as well as overtime often overtime. If you don't exercise, kidney deficiency is also related to a certain extent.

Man evolved from apes, and now that the hair that should be retained should be properly preserved. And the hair. It's a remarkable part of human development. Retain.

Why do people have hair? I think that when people first evolved, they had hair, probably to protect your scalp, to protect your skull, after all, there is hair, which can be a protective effect, and people with hair are also good-looking, which is a problem in the history of human evolution.

People will lose their hair because they stay up late, because they lack nutrition, they will lose their hair, they will lose their hair when they are under a lot of pressure, and they will lose their hair if they have oil on their heads.

If you don't have hair, you'll have a bare scalp and your body will be very fragile.

Because hair is also a tissue of the human body, it must grow. Hair is a function that protects the scalp.

Therefore, it is normal to have hair because it is an attachment that belongs to people.

People have long hair, just like animal hair, and it is used to keep out the cold, and it also has an aesthetic effect.

Because this is the development of human beings from ancient times to the present, that is, if we have hair, it can protect our scalp.

Because everybody has those fibers on their heads, it's gone, because children are born with hair.

Why do people have hair? If this is a question worthy of scientific research, because just like people, why do they distinguish between men and women?

Why do people have hair? This is a relatively simple thing, because the hair thing is not, there is no way to explain it, it is not innate.

People have long hair because of a physical trait that people have formed in the process of evolution, and there is no special reason.

Human hair covers the scalp and has the effect of protecting the scalp, so we should protect the hair.

Because your hair will make people hungrier, and if you are bald, it will be too ugly.

Summary. Hello, the reason why people have hair is: survival advantage: protect the head, block the scorching African sun, prevent the brain from overheating.

Hello, the reason why people have hair is: survival advantage: protect the head, block the scorching African sun, prevent the brain from overheating.

Human ancestors ran in the strong sunlit East African savannah, long hair fluttering hair can block most of the sun's damage to **, natural selection allows the long hair genes to be inherited and spread in the human gene pool.

The result of natural evolution.

Cold. We used to have long hair all over our bodies.

Later we started getting dressed. So the hair on the body part degenerates.

But we didn't wear hats all the time, so we kept our hair.

If we feel the need to wear hats all the time now, I am afraid that thousands of years from now, there will be no hair left.

This is the same as why animals have hair, the same as keeping warm

Human hair is grown in order to play a role in physical protection, don't underestimate a thin layer of hair, this fiber has a very low coefficient of friction, excellent toughness, can effectively resist the unexpected impact of the natural environment of the macro slippery bridge, is definitely a miracle in evolutionary materials science.

Human long hair has the effect of heat dissipation and sun protection, people's brains are too big to make cherry blossoms, too sensitive, too fragile and too important, people with bad brains must have died in evolutionary selection, those who survive have brains, it definitely needs a very strict protection, first of all, the temperature is constant, the summer of the African savannah, exposure to the sun at noon, and the temperature difference of more than ten degrees at night, the hair can be very well and very evenly adjusted the head temperature, and there will be no hot-headed or confused situation because of the cold.

In addition, hair is a tactile organ, which is much more sensitive than **, and can feel the changes in the external environment at any time.

There is an important brain in the human head, and if the brain is damaged, it will be a major event or even fatal, so the hair is to protect the brain from cold and injury.

Because people are hairy animals, in fact, the whole body of people is hair, but the hair on the head grows faster.

This is a long story, you only give five points, pay attention to you, if you don't want to shave, smear some vegetable oil, smooth, it won't grow in the future....Thank you.

It's that earthlings will have long heads, there's nothing to worry about, are you a Martian?

Do you like to look at people without hair?

When God created man, he didn't like to look bald and should be a man with hair.

The head is the command center of people, and the hair grows on the head to play a protective role.

Because hair can play a beautiful role.

Warm protection of the role of the scalp ang!

So be long!

If you don't have hair, you don't know what it looks like, but I know that if you don't have hair, the salon will go out of business.

After all, it's a problem with genes.

Genes determine traits.

Hair genes determine hair.

And why are there genes?

This is to talk about the flood era hundreds of millions of years ago, in that lifeless world, complex physical and chemical changes led to the emergence of living substances proteins and nucleic acids, resulting in the emergence of the most primitive life, and after thousands of years of evolution, human beings have come to this day. It can be said that having hair is a kind of adaptation of human beings to the outside world.

I don't know.

I also want to know what to say.

But think about how ugly it is to have no hair.

Shade from the sun.

It looks better that way, too.

It's beautiful, it's beautiful.

Because it's people.

So grow hair.

Your mother gave birth to it, it's really benzene.

In order to cover up their ugliness.

Because it's people. If you are human, you will grow hair!

Human beings have long hair on the one hand to keep warm and on the other hand to protect the body.