Which part of the epidermal root sheath contains both an internal and external layer?

The epidermal root sheath is an essential part of hair follicle anatomy that helps in the growth and structure of hair. It consists of two layers: the internal and external layers. The internal layer is made up of cells that help to form the hair itself, whereas the external layer serves as a protective covering and is in direct contact with the dermal structure.

Understanding the organization of the epidermal root sheath is crucial for various practices, including waxing and other hair removal techniques. This knowledge aids in recognizing how hair grows, which can inform techniques to avoid damage to the surrounding skin when performing hair removal.

The dermal root sheath primarily provides structural support and does not itself have an internal and external layer configuration. The cortical and cuticular layers refer specifically to parts of the hair shaft rather than the structure of the hair follicle itself. Therefore, recognizing the unique double-layered structure of the epidermal root sheath is essential in distinguishing it from the other parts mentioned.