Which skin layer contains blood vessels and nerve endings?

• A. Epidermis
• B. Subcutaneous layer
• C. Dermis
• D. Outer layer

Answer: (C)

The dermis is the correct answer because it is the middle layer of the skin located beneath the epidermis. This layer is rich in blood vessels, which provide nutrients to the skin and help regulate temperature through the dilation or constriction of these vessels. Additionally, the dermis contains a variety of nerve endings that contribute to the sensation of touch, pain, and temperature.

The epidermis, although it serves as the outer protective layer of skin, does not contain blood vessels; it receives nourishment through diffusion from the dermis. The subcutaneous layer, while it also supports blood vessels and nerves, primarily consists of fat and connective tissue, serving as insulation and cushioning for the body rather than being a primary layer of skin. The term "outer layer" is vague and does not specifically refer to a recognized layer of skin anatomy. Hence, the presence of blood vessels and nerve endings is a defining feature of the dermis, making it the appropriate choice.