The study of hair is called Trichology. Hair covers all parts of the body, except for the lips, palms and soles. It even covers parts of the reproductive organs. You are probably not aware of the amount of hair you have unless it is growing in undesirable areas.
Hair has a very practical purpose.
In your nose and ear, it keeps foreign bodies from invading you. Under the arms and in the pubic areas, it protects your body from friction. The hair on your head cushions you from blows and keeps your head warm in the winter and cool in the summer. Your eyebrows keep sweat from running into your eyes, and eyelashes shade the eyes and help to keep out the dust. There are two main divisions of the hair, one above the surface of the skin and one below it.