Anatomy of the Hair

Anatomy of a hair
 
A cross-sectional view illustrating the structure of a hair follicle and surrounding tissues.
 
The illustration labels several components:
 
• Hair Shaft – The visible part of the hair that extends above the skin.
 
• Epidermis (Skin) – The outermost layer of the skin.
 
• Hair Root – The portion of the hair embedded within the skin.
 
• Hair Follicle – The structure that surrounds the hair root.
 
• Hair Bulb – The enlarged base of the hair follicle.
 
• Arrector Pili – A small muscle attached to the hair follicle.
 
• Sebaceous Gland – Produces oil that lubricates the hair and skin.
 
• Dermal Papilla – The structure at the base of the follicle that supplies blood.
 
See also: Hair growth information