Where does your hair?

The hair always grows through the skin in the same way, no matter where it comes out (of your head, arm or ankle). Start at the root capillaries beneath the skin, where cells are grouped to form keratin (the protein from being formed nails). The root is within a follicle, which is a kind of small tube into the skin. 

The hair grows from the root, leaves the follicle and goes through the skin, making it visible. The small blood vessels that are at the base of each follicle feed the roots of the hair to permit their growth. But once the hair emerge from the surface of the skin, the cells that form it are no longer alive. The cells of one of the hairs that you see in your body are dead. That's why when you cut your hair does not hurt us. 

Virtually every hair follicle is connected to a Sebaceous gland. These sebaceous glands produce a substance, tallow, which gives the skin a shiny appearance and protects making it water resistant. Sometimes, for example during puberty, these glands can produce too much sebum (fat), which causes the hair of a person is oily. If that's the case, it is time to wash your hair! 
What took the wind! 

You have more than 100,000 hairs on your scalp, but every day many of them you fall. Every day, you lose about 50 to 100 hairs. This happens while you wash your hair, you comb, brush or just while you're immobile. But do not worry, constantly grow new hair to replace those that are going to fall. 

Every hair on your scalp grows for about 2 to 6 years. Then, resting for a few months and finally falls. It replaced a hair again, it starts to grow in the hair follicle. This cycle of growth, rest, fall and replacement to maintain an adequate amount of hair on your head.