MICROANATOMY

Detailed explanation-1: -The cortex of the hair shaft is located between the hair cuticle and medulla and is the thickest hair layer. It contains most of the hair’s pigment, giving the hair its color. The major pigment in the cortex is melanin, which is also found in skin.

Detailed explanation-2: -The hair cuticle is the outermost part of the hair shaft. It is formed from dead cells, overlapping in layers, which form scales that strengthen and protect the hair shaft. While the cuticle is the outermost layer, it is not responsible for the color of the hair.

Detailed explanation-3: -There are three important segments of hair follicles found on the head: the infundibulum, the isthmus, and the lower follicle/inferior segment (which includes the bulb). The infundibulum segment is the upper portion of the follicle.