What are the three primary layers of hair?

The three primary layers of hair consist of the cuticle, cortex, and medulla.

The cuticle is the outermost protective layer of the hair, composed of overlapping cells that help shield the inner layers from damage, moisture loss, and environmental influences. This layer plays a crucial role in the overall health and appearance of the hair, as its condition can affect shine and smoothness.

The cortex lies beneath the cuticle and is the thickest layer of hair. It contains long chains of proteins and is responsible for the hair's strength, elasticity, and color. The arrangement of the cortex determines vital characteristics such as texture and wave pattern, making it essential for styling and treatment processes.

The medulla is the innermost layer, which may or may not be present in all hair types. It is typically a soft, spongy center that serves less of a functional purpose compared to the other layers, but it can contribute to the overall structure and thickness of the hair.

Understanding these three layers is fundamental for anyone in the cosmetology field, as the properties and condition of each layer can significantly influence hair care practices and treatments. Other options like root, shaft, and tip refer to parts of the hair but do not represent the structural layers