New York State Cosmetology Practice Exam 2026 – The All-in-One Guide to Master Your Certification!

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

The cuticle is the outermost layer, made up of overlapping, scale-like cells that protect the inner layers from damage and moisture loss. It plays a crucial role in the overall health of the hair, as it reflects light and contributes to shine.

The cortex is the thickest layer located beneath the cuticle and contains fibrous proteins and melanin, determining the hair's strength, color, and texture. It is essential for the hair's elasticity and provides its structural integrity.

The medulla is the innermost layer, which may not be present in all hair types. It consists of a soft, spongy tissue that can impact the hair's characteristics. While its exact function is less understood, the presence of the medulla can influence hair texture and density.

Understanding these layers is vital for hair care and treatments, as each layer plays a significant role in the hair's appearance and health. The other options refer to different aspects of hair or anatomy that do not specifically identify the three layers of hair.