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)
A hair bulb is just one of many structures of or associated with hair follicles. See also the links to pages about other accessory structures of the skin.
The topic of the structure of a hair follicle is included in some courses in health sciences, including subjects such as nursing, skin care, hair care, beauty therapy and various holistic therapies.