Laser Technician IBEC Board Exam 2025 – All-in-One Study Guide to Master Your Certification!

The outermost layer of the hair structure is known as the cuticle. The cuticle consists of overlapping, scale-like cells that provide protection to the inner structures of the hair, such as the cortex and medulla. This layer plays a crucial role in determining the hair's texture and shine. Its primary function is to shield the hair from damage caused by environmental factors, chemicals, and physical stress. A healthy cuticle contributes to the overall strength and appearance of the hair, making it essential for maintaining healthy hair follicles.

The medulla is the innermost layer and not involved in the outer protective characteristics. The cortex is the middle layer that contains fibers and pigment but does not serve as the outermost defense. The dermal layer refers to the skin layer that houses hair follicles but is not part of the hair structure itself. Understanding these distinctions helps in comprehending hair anatomy and its significance in treatments related to hair care and laser technology.