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Hair is a filamentous biomaterial that grows from follicles
found in the dermis. Hair is one of the defining characteristics
of mammals. The human body, apart from areas of glabrous skin,
is covered in follicles which produce thick terminal and fine
vellus hair. Most common interest in hair is focused on hair
growth, hair types and hair care, but hair is also an important
biomaterial primarily composed of protein, notably keratin.
Attitudes towards hair, such as hairstyles and hair removal,
vary widely across different cultures and historical periods,
but it is often used to indicate a person's personal beliefs or
social position, such as their age, gender, or religion. The
word "hair" often refers to two distinct structures: - the part
beneath the skin, called the hair follicle or when pulled from
the skin, called the bulb. This organ is located in the dermis
and maintains stem cells