MICROANATOMY

Detailed explanation-1: -The shaft is the visible part of the hair that sticks out of the skin. The hair root is in the skin and extends down to the deeper layers of the skin. It is surrounded by the hair follicle (a sheath of skin and connective tissue), which is also connected to a sebaceous gland.

Detailed explanation-2: -The hair shaft consists of a cortex and cuticle cells, and a medulla for some types of hairs.

Detailed explanation-3: -The hair shaft is formed by the proliferation and differentiation of the matrix cells upward through the lumen of the follicle. The differentiated hair consists of keratinocytes that form a medullary core surrounded by a cortex. Figure 3.2. Structure of the hair follicle.