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 for a haircut or a manicure, remember these facts.
Facial hair grows faster than any other body hair. If the average person had not shaved his beard all his life, then he would have grown by 9 m.
A person constantly loses hair, which is approximately 60-100 pieces per day. The amount of lost hair depends on several factors, including: change of season, pregnancy, illness, diet, age.
Female hair in diameter is two times smaller than male. Men's hair is rougher than female hair.
The diameter of male hair can vary greatly.
One human hair is able to withstand the weight of 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 regard, people are not very different from monkeys. We all have a lot of hair, but we do not notice this, 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 able to produce 20 individual hairs over the course of a person’s life.
Blondes have an average of 146,000 follicles, and people with black hair, usually about 110,000 follicles. People with brown hair have an average of 100,000 follicles and redheads have the least dense hair, about 86,000 follicles.
Interesting fact! Superimposed on each other keratin scales form the outer sheath of the hair. The rod is the visible part of the hair. Hair root is the part of the hair that is under the skin. The hair root in turn is surrounded by a hair follicle, which is 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-shaped, and straight from a round follicle.
Fingernails grow 4 times faster than toenails.
If you notice that you are cutting your fingernails more often, then it does not seem to you.
This is due to the fact that those nails that receive a greater external effect and are used more often grow faster.
On average, nails on both legs and arms grow 0.25 cm each month.
The average lifespan of a human hair on the body is from 3 to 7 years. Despite the fact that your hair grows every day and rather quickly, they can live for a very long time, provided they are well groomed.
With age, a person loses more than 50% of his hair, still for an unknown reason. You lose hundreds of hairs every day, but for loss to be noticeable, you need to lose several times more.
Human hair is almost indestructible. Human hair disintegrates at such a slow pace that it can be said - they are eternal.
If you have never thought about it, the facts will say 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 caustic chemicals.
Note! The main protein of hair is keratin. It is keratinous compounds that form strong, complex proteins, which in turn ensure the resistance of hair to external factors.