Electrolysis Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The correct answer highlights the main function of the dermis layer, which is support and nourishment. The dermis is the deeper layer of the skin, situated beneath the epidermis. It is composed of connective tissue that contains collagen and elastin fibers, providing strength, elasticity, and structural support to the skin.

In addition to its supportive role, the dermis houses vital components such as blood vessels, lymphatic vessels, nerve endings, and hair follicles, which contribute to its nourishing function. Nutrients and oxygen from blood vessels in the dermis support the health of skin cells in the epidermis above, facilitating processes like healing and regeneration.

While the other options mentioned—protection, storage of fat, and water retention—are relevant functions of different skin layers or other tissues, they don't encapsulate the primary role of the dermis as effectively. The epidermis primarily serves as a protective barrier, while subcutaneous tissue (not part of the dermis) is primarily responsible for fat storage and insulation. Water retention is more directly linked to the outer layers of the skin, which help prevent transepidermal water loss. Thus, the focus on support and nourishment aptly describes the core function of the dermis.