California State Board Barber Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The three parts of the hair structure are the cuticle, cortex, and medulla. Each of these components plays a crucial role in the overall health, appearance, and behavior of the hair.

The cuticle is the outermost layer and consists of overlapping cells that help protect the inner layers from damage and environmental factors. This layer is important for determining the hair's shine and smoothness.

The cortex lies beneath the cuticle and is the thickest part of the hair. It is made up of elongated cells filled with keratin and is responsible for the hair's strength, color, and texture. The cortex can absorb moisture and influence how hair reacts to treatments like coloring and perming.

The medulla is the innermost core of the hair, which may or may not be present in all hair types, especially in fine or thin hair. In thicker hair, the medulla can contribute to the overall thickness and density of the hair strand.

Understanding these parts is essential for barbers as it informs how hair responds to different styling techniques and treatments, which is directly related to their service quality and the health of their clients' hair. The other choices do not correctly represent the anatomical structure of hair, focusing instead on aspects or products that