In which layer of the skin does hair growth occur?

• A. Hypodermis
• B. Epidermis
• C. Dermis
• D. Stratum corneum

Answer: (C)

Hair growth occurs in the dermis, which is the layer of skin located beneath the epidermis. The dermis contains hair follicles, the structures from which hair grows. Each hair follicle is surrounded by a rich supply of blood vessels and is also equipped with various cells and tissues essential for the hair growth process.

Within the hair follicle, the hair bulb, located at the base, plays a crucial role, where cells divide and grow to form hair. Additionally, the dermis houses other supporting structures, including sebaceous glands, which provide lubrication to the hair and skin, and a nerve network that contributes to sensation.

In contrast, other layers mentioned do not participate directly in hair growth. The hypodermis primarily serves as a layer of fatty tissue for insulation and cushioning but does not contain hair follicles. The epidermis is the outermost layer of skin, providing a protective barrier but also does not have the capacity for hair production. The stratum corneum, being the outermost part of the epidermis, is composed of dead skin cells that have no involvement in the growth process of hair. Thus, the dermis is the correct answer for the site of hair growth.