Hairs

Hair (pili) is a filamentous, keratinized structure produced by the hair follicle, a complex mini-organ embedded within the dermis and epidermis of the skin. Hair is a primary characteristic of mammals and serves multiple functions including thermoregulation, physical protection, sensory activity, sebum and pheromone production, and social/sexual interactions.

It includes:

• Downy hair

• Hairs of head

• Hairs of eyebrow

• Eyelashes

• Hairs of beard

• Hairs of tragus

• Hairs of vestibule of nose

• Axillary hairs

• Pubic hairs

• Hair shaft

• Hair follicle