Which layer of the skin contains blood vessels and nerves?

The dermis is the layer of skin that contains blood vessels and nerves, making it critical for supplying nutrients and sensory information to the skin. This middle layer of skin is situated beneath the epidermis and above the subcutaneous tissue, and it plays a vital role in thermoregulation, sensation, and overall skin health.

In the dermis, you will find a rich network of blood vessels that help regulate temperature by controlling blood flow to the skin's surface. Additionally, the presence of nerve endings in the dermis allows for the sensation of touch, pressure, pain, and temperature, which are essential for the body’s interaction with the environment.

While the epidermis is the outermost layer and primarily serves a protective function, it does not contain blood vessels or nerves; instead, it relies on the dermis for nutrients and support. The subcutaneous tissue, also known as the hypodermis, lies beneath the dermis and primarily consists of fat and connective tissue, providing insulation and cushioning, but it is not where the blood vessel and nerve networks are active in the same capacity as in the dermis.