Hairs are threads of fused (i.e. attached together), dead, keratinized cells.
The hair bulb is the bulb-shaped structure at the base of the hair follicle of which it is a part.
Each hair bulb includes:
- several layers of different types of cells that extend up through the hair follicle
- a region of cells called the germinal matrix
(the area of cells that produces new hairs by mitosis)
- an indentation called the papilla of the hair
(containing many blood vessels that supply nutrients to nourish the growing hair)
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This is in the Structures of the Skin section of the health glossary.
See also:
The "hair bulb" is just one of the structures of a hair follicle. See also the links to pages about other accessory structures of the skin.
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