MICROANATOMY

Detailed explanation-1: -Surrounding the hair, towards the base of the hair follicle is the internal root sheath, which consists of keratinised cells from the hair matrix. The type of keratin here is softer than that of the hair, and is the same as that found on the surface of the skin.

Detailed explanation-2: -The hair follicle begins at the surface of the epidermis. For follicles that produce terminal hairs, the hair follicle extends into the deep dermis, and sometimes even subcutis. Meanwhile, follicles producing vellus hairs extend only to the upper reticular dermis.

Detailed explanation-3: -The inner root sheath or internal root sheath of the hair follicle is located between the outer root sheath and the hair shaft. It is made of three layers: Henle’s layer, Huxley’s layer, and the cuticle. Henle’s layer is the outermost layer of the inner root sheath, consisting of a single row of cubical cells.