Is everyone s skin the same and why does people s skin have different colors

Genes dictate different characteristics of each person's body, such as **, hair, and eye color. But that's not to say that the human body contains only one specific skin color gene. In fact, each of us has about 100,000 pairs of genes in our bodies, one from our mother and the other from our father.

Each pair of genes controls a chemical change in the human body. Dozens of chemical processes add up to determine a person's skin color.

In the world, there is a part of the people with fair skin and golden hair, called Caucasians, which is the name ** in Latin.

The original meaning is white. The chemical process of many different pairs of genes gives rise to this unusual skin color.

Black** is UV resistant.

Although UV rays are harmful, they help the body obtain vitamin D

In places where sunlight is scarce, people need to have a white color that is less resistant to UV rays** in order to get enough vitamin D.

Black and white people intermarry, and the children born are light-skinned, between the skin colors of their parents. This is due to the fact that they carry genes that are passed down from their parents to control pigmentation. Between siblings, some have darker skin and some have lighter skin, which is caused by the difference in the number of genes they inherit from their parents.

Of course, everyone's skin type is different.

It is not the same, there are dry, neutral, oily, mixed.

3 Caucasians.

Black, yellow.

Human beings are like a mirror, reflecting their vitality and health status. People with different health conditions have different skin tones, and there are very obvious differences in skin color between different races. Yellow people have a pale yellow complexion; Black people have dark complexions; Caucasians' skin tones are light and pale in color.

So, why are there people of different skin colors in the world?

The color is mainly determined by the amount of melanin in it. Melanin is a black or brown particle, and its main role is to block the damage of ultraviolet rays in the sun's rays to the cells below the human body**. When the sun is stronger, the amount of melanin increases, so we get tanned in the summer.

The color of human beings is the result of adaptation to nature in the process of evolution. Africans living in the equatorial region, due to ** are often strongly affected.

When exposed to sunlight, a large amount of melanin is produced in the body, so Africans** are black. In the alpine land less, so, ** is white. Yellow people generally live in temperate regions, the intensity of sunlight is in the middle, and melanin is also in between, so the color of ** is also between the two people.

Scientists have found that there is no difference in the ancestors of human beings at the beginning, and the skin color is basically the same. It was only later that people moved to different regions and gradually developed differences in skin color in order to adapt to the outside environment.

There are six different colors of human beings, namely red, yellow, brown, blue, black and white, mainly due to the different amounts and distribution of melanin in humans. Melanin is a protein derivative that is brown or black in color and is produced by melanocytes. Due to the different amounts, sizes, types and distribution of melanin, different skin tones are determined.

The melanin in the yellow race** is mainly distributed in the basal layer of the epidermis, and less in the spinous layer; In black people, there is a large amount of melanin in the basal layer, spinous layer, and granular layer; The distribution of melanin in Caucasians** is the same as in yellow people, except that the amount of melanin is less than that in yellow people.

Blue Man: John, a physiologist at the University of California, San Diego School of Medicine. West, who has done research near Kenquega, Chile, at an altitude of 6,000 meters, has witnessed a group of blue ** people (referred to as blue people).

There are 4 types of people in the world, namely yellow, white, black and brown.

We all know that there are several races in the world, and many of us can distinguish them from the skin color, but many people know why people's skin colors have different colors?

Why do people's ** have different colors

Sociologists or anthropologists often define different races according to the different skin colors of people, for example, yellow people, white people, black people, etc.

The color of human beings is mainly determined by the amount of melanin in it. The content of melanin is different, which also forms people with different skin tones.

In order to adapt to different living environments, human beings have been constantly evolving their bodies, such as melanin, because too much or too little ultraviolet rays are not good for the human body, and melanin is like an "umbrella" that blocks ultraviolet rays.

Therefore, in places such as Africa, where the sun is exposed to more intensely, the higher the melanin content in the human body, and the skin tone of the person will naturally appear black. In places like North America, where sun exposure is less intense, people's skin tone is mostly white.

The color is mainly determined by the amount of melanin in it. The amount of melanin contained in people's ** is somewhat different, and people of different skin colors are formed.

The more melanin you have, the darker your skin tone. People with light skin who stay in the sun for a long time will produce a lot of melanin, in other words, the person is sunburned. People with albinism do not have melanin in them, and their color is usually pink, which is actually the color of blood through the colorless color.

Today, human beings are found in all corners of the world, and the color of people's skin reflects the climate conditions of the world: in Scandinavia, where there is little sunlight, the inhabitants have the lightest skin tone; Residents of sunnier areas,** appear golden or pale brown; The indigenous peoples living in Africa and Australia have the darkest populations.