Hair is a filamentous biomaterial that grows from the skin of mammals. Each hair is made up of a shaft, which is the visible part, and a root, which is embedded in the skin. The shaft is composed of keratin, a fibrous protein, and the root is composed of living cells that produce the hair shaft.
Hair is an important part of the human body. It provides insulation, protection from the sun and cold, and a sense of touch. Hair can also be a fashion statement and a way to express oneself.




