The hair root is made up of three main structures, the follicle, bulb, and

• A. Arrector Pili
• B. Sebaceous Gland
• C. Dermal Papilla
• D. Hair Shaft

Answer: (C)

The hair root includes the follicle, bulb, and dermal papilla. The dermal papilla sits at the base of the hair follicle and contains the blood vessels and nerves that nourish the hair matrix in the bulb, providing the nutrients and signals needed for hair growth and cycling. Without this vascular connective tissue, the hair cannot grow properly. The arrector pili is a small muscle attached to the follicle that causes goosebumps, not a core structural part of the root. The sebaceous gland associates with the follicle and secretes oil, but it isn’t one of the main root structures. The hair shaft is the portion that extends above the skin surface, not part of the root itself.