Cortex

Definition

In the context of the integumentary system and specifically regarding the accessory structures of the skin, the cortex is the primary part of a hair, composed of keratin, that provides strength, color, and texture. It lies between the hair's outer cuticle and its inner medulla.

Related terms

Keratin:

A type of protein found in skin cells that helps to make up hair, nails, and skin surface providing durability and protection against damage.

Cuticle (Hair): The outermost layer of a hair strand that consists of overlapping scale-like cells acting as a protective barrier for the inner layers.

Medulla (Hair): The innermost layer of a hair strand that can be hollow or filled with cells and is not always present in all hair types; it contributes to hair's elasticity and texture