Incredible facts about the human body. Hair and nails
Despite the fact that they are not vital organs of the human body, most people spend a lot of time taking care of their hair and nails.
The next time you go to a haircut or manicure, remember these facts.
Hair on the face
The hair on the face grows faster than any other hair on the body. If the average person did not shave his beard all his life, then it would have grown by 9 m.
A person constantly loses hair, which is approximately 60-100 pieces per day. The number of lost hair depends on several factors, including: season change, pregnancy, illness, diet, age.
Female hair in diameter is half the size of men's. Male hair is coarser than female hair.
The diameter of the male hair can be very different.
One human hair is able to withstand weight in 99 g. Therefore, the tale of Rapunzel actually looks believable.
The fastest growing nail on the middle finger.
It is not yet known why, but the growth of nails is associated with long fingers.
The longer the finger, the faster the nails will grow.
Who has more hair
Some people have an increased amount of hair almost like a chimpanzee. In this respect, people are not very different from monkeys. We all have a lot of hair, but we do not notice it, since most hairs are too thin and small.
Blondes have more hair than brunettes.
Hair color determines their density. Each person has an average of 100,000 hair follicles, each of which is capable of producing 20 separate hairs during a person's life.
Blondes on average have 146,000 follicles, and people with black hair, usually about 110,000 follicles. People with chestnut hair have an average of 100,000 follicles and redheads have the least thick hair, about 86,000 follicles.
Interesting fact! The superimposed keratin scales form the outer skin of the hair. The stem is the visible part of the hair. The hair root is the part of the hair that is under the skin. The hair root is in turn surrounded by a hair follicle called the follicle.
The type of hair depends on the shape of the follicle. Slightly curly hair grows from an oval follicle, curly from a kidney, and straight from a round follicle.
Growth of nails
Nails on hands grow 4 times faster than nails on legs.
If you notice that you cut your fingernails more often, then this does not seem to you.
This is due to the fact that those nails that receive a greater external impact and are used more often grow faster.
In average, the nails on both legs and arms grow by 0.25 cm every month.
The life span of a human hair on the body is on average 3 to 7 years. Despite the fact that your hair grows every day and pretty quickly, they can live a very long time, provided that they are well groomed.
With age, a person loses more than 50% of their hair, for the unknown reason. You lose hundreds of hairs every day, but to be noticeable loss, you need to lose several times more.
Human hair almost does not lend itself to destruction. Human hair decays at such a slow pace that you can say - they are eternal.
If you have never thought about it, the facts will tell a lot: hair can not be destroyed by cold, climate change, water and other natural elements. They are also resistant to many types of acids and corrosive chemicals.
For your information! The main protein of hair is keratin. It is the keratin compounds that form strong, complex proteins, which in turn ensure the resistance of the hair to the effects of external factors.