Hair follicle bulge

Definition

The area located in the bottom of the permanent portion of a resting (telogen) hair follicle where the cells of the external root sheath of the hair follicle are contiguous with the basal layer of the epidermis; this portion of the follicle is involved in the generation of a new hair at the onset of the hair growth cycle (anagen) and contains the hair follicle stem cells.

Also known as bulge of hair follicle — per UBERON

The Hair follicle bulge is a part of the Integumentary.