What is the primary function of the dermis?

The primary function of the dermis is to connect the epidermis to the blood supply and contain living cells. The dermis plays a crucial role in providing nutrients to the overlying epidermis, which is avascular (lacking blood vessels). This layer of skin contains essential structures such as blood vessels, nerves, hair follicles, and glands, all of which contribute to its supportive and connective roles. Moreover, the presence of living cells within the dermis is vital for processes such as healing and regeneration, serving to maintain the overall health and functionality of the skin.

While some of the other options describe functions related to skin or body systems, they do not accurately capture the primary role of the dermis as a connective and supportive layer. Protecting against UV radiation involves the epidermis, particularly due to its melanin-producing cells; providing structural support and housing for organs pertains more to the skeletal system or deeper tissue structures; and enabling movement of skin through muscle tissue generally relates to the hypodermis and muscles beneath the skin rather than the dermis itself. Thus, the primary function of the dermis lies in its role as a connector and provider for the epidermis.