What is the main purpose of the dermis layer of the skin?

The main purpose of the dermis layer of the skin is to hold hair follicles and sweat glands. The dermis is a thick layer situated beneath the epidermis and is rich in connective tissue, which provides structural support and elasticity to the skin. It contains various components such as blood vessels, lymphatic vessels, nerve endings, and a variety of glands, including sebaceous (oil) glands and sweat glands, that play vital roles in thermoregulation and maintaining skin moisture.

Additionally, the presence of hair follicles within the dermis contributes to the skin's protective functions and sensory experiences, as hair can sense changes in the environment. The dermis is essential for anchoring hair and glands, making it crucial for overall skin health and functionality.

The other options, while they may relate to the overall function of the skin and the epidermis, do not define the primary role of the dermis itself. The dermis primarily provides structural integrity and houses essential appendages rather than directly protecting from UV light, minimizing moisture loss, or providing cellular repair, which are more associated with the epidermis and other skin functions.