Some Blacks, for example, may have kinkier hair and some Indians courser hair than others, but each inherits their kind. The average adult will wash their hair 17,010 times over the course of six months. There are some 120,000 hairs on the entire human scalp. Black and brown heads run nearer the average. You lose on average 80 hairs a day.
Hair is much more elastic than is usually realized.
A hair can be stretched one-fifth of its length. It can support two to five ounces of weight without breaking. As is generally known, the dampness or dryness of the atmosphere affects the curliness of the hair, since it is very sensitive to moisture. The characteristic has been put to use in the manufacture of hygrometers, instruments that measure the amount of moisture in the air. That the friction between a comb and the hair produces static electricity is also well known.