Which skin layer contains hair follicles?

The correct answer is the dermis, as this skin layer is responsible for housing various structures essential to skin function, including hair follicles. The dermis consists of connective tissue and is located beneath the epidermis. It contains blood vessels, nerves, and a variety of skin appendages, including hair follicles, sebaceous (oil) glands, and sweat glands.

The presence of hair follicles in the dermis is crucial for hair growth and skin health. The follicles are formed from epidermal cells that extend into the dermis and are surrounded by connective tissue, providing the necessary support and nutrients for hair development.

In contrast, the epidermis, which is the outermost layer of skin, does not contain blood vessels or hair follicles; rather, it is primarily responsible for providing a protective barrier. The hypodermis, also known as the subcutaneous layer, lies below the dermis and primarily consists of fat and connective tissue, serving as insulation and cushioning but not containing hair follicles. The subcutaneous layer functions to anchor the skin to underlying tissues rather than contribute to the structural components of hair and skin appendages.