What term is used to describe the outermost layer of the hair structure?

The outermost layer of the hair structure is known as the cuticle. This layer plays a crucial role in the overall health and appearance of hair. The cuticle consists of overlapping, flat cells that create a protective barrier around the inner layers of the hair shaft. This protective layer helps to prevent damage from environmental factors, such as heat and chemicals, as well as physical wear and tear. Additionally, a healthy cuticle can enhance the hair's shine and smoothness, making it look more vibrant.

The cortex is the layer beneath the cuticle and is responsible for the strength, color, and texture of the hair. The medulla is the innermost layer, which may not be present in all hair types and generally plays a lesser role in hair characteristics. The follicle refers to the skin structure that surrounds the hair root and is not part of the hair shaft itself. Understanding these layers is vital for effective hair care and hair removal practices.