Tennessee Cosmetology Practice Exam

The three layers of the hair structure are indeed the cuticle, cortex, and medulla. These layers each play a crucial role in the overall characteristics and strength of the hair.

The cuticle is the outermost layer, composed of overlapping scale-like cells that protect the inner structures of the hair. It helps to prevent damage from environmental factors and maintains moisture within the hair shaft.

The cortex lies beneath the cuticle and makes up the majority of the hair's structure. It contains fibrous proteins and is responsible for the hair's strength, color, and texture. The cortex also plays an essential role in the hair's ability to be styled and managed.

The medulla is the innermost layer, which is not always present in every hair type. When it is present, it can play a role in the hair's overall thickness and contributes to its insulating properties.

Understanding these three layers is fundamental for cosmetology students because it helps in selecting the appropriate hair care products and techniques for different hair types.