Hair



H air originates in tiny sacs or follicles deep in the dermis layer of skin tissue. The part of the hair below the skin surface is the root; the part above is the shaft. Hair follicles are closely connected to the sebaceous glands, which secrete oil to the scalp and give hair its natural sheen. Hair grows from the root outward, pushing the shaft farther from the scalp.



User Contributions:

Comment about this article, ask questions, or add new information about this topic:

CAPTCHA