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why does hair grow?
 Hair is essentially a protein that is made up of a follicle, root and bulb. The follicle, which is located deep in the skin, is attached to a tiny sebaceous gland and muscle fiber. Hair grows when the follicle collects and bundles old cells. The sebaceous gland and muscle fiber push the bundles up through the skin in a root sheath. This sheath has two layers, an internal and external layer. The external layer contains RNA that gives the hair its color and texture. The internal layer contains the hair fiber.


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