Red Seal Cosmetology Practice Exam

The hair shaft refers to the visible part of the hair that extends out of the skin. The hair follicle is a tunnel-like structure in the skin where the hair root is located. The dermal papilla is a small projection at the base of the hair follicle that provides nourishment to the hair root. Only the hair bulb, which is the thickened, club-shaped structure at the bottom of the hair root, forms the lower part of the hair root.