What are the benefits of black hair

Black hair is actually a sign of good health, because hair is an important part of the human body. It not only has a good cosmetic effect, but also can protect our head, and can also regulate nerves.

1. Hair is an important part of the human body. Babies are born with beautiful hair. Hair is an appendage of the skin. Hair plays a very important role in people's lives.

2. Cosmetic effect: Having shiny black hair, trimmed neatly and elegantly, with appropriate length and transparency, when presented in front of everyone, gives people a sense of elegance and beauty; on the contrary, if it is made fluffy, messy and dirty, it will give people an unpleasant feeling.

3. Protective function: Thousands of hairs wrap around the head, naturally forming the first line of defense for the head. Thick, healthy and clean hair can protect the head from external mechanical and bacterial damage, and plays an important role in fitness.

4. Sensory function: Hair is relatively sensitive. When the external environment affects the human body, whether it is windy, rainy, or sun-bathed, the first thing to feel it is the hair. The information it sends is transmitted to the brain, so that a variety of protective measures are taken.

5. Regulatory function: Hair can play a role in regulating body temperature. In winter, the wind is cold and the blood vessels are constricted, so the hair can keep the head warm. In summer, the sun is scorching and the blood vessels are dilated, so the hair can dissipate heat. Therefore, hair has the dual function of both retaining heat and dissipating heat.

Hair is a fibrous tissue that grows from the scalp and is an arrangement of hard keratin formed by cell regeneration. Hair is composed of two parts: the root and the shaft.

6. The growth rate of hair is 1-2 cm per month, 10-20 cm per year, and the growth cycle is 3-6 years. After that, it will fall out, and new hair will grow after about half a year.