What are the three layers of the inner root sheath starting with the innermost layer?

In the structure of the hair follicle, the inner root sheath plays a crucial role in shaping the hair as it grows. This sheath is composed of three distinct layers, which, from innermost to outermost, are the cuticle, Huxley layer, and Henley layer.

The cuticle is the closest layer to the hair and serves to protect the inner structures of the hair follicle. It consists of flat cells arranged in a shingle-like manner. The Huxley layer is the middle layer, which is responsible for providing strength and support to the inner root sheath. It consists of several layers of cuboidal cells that can aid in the overall integrity of the hair follicle. Finally, the Henley layer is the outermost layer of the inner root sheath, acting as a boundary that helps anchor the inner root sheath to the hair follicle.

Understanding the order and function of these layers is important for anyone studying electrology and hair growth, as they relate directly to the process of hair removal and the anatomy of hair follicles.