Which part of the skin is known for containing nerves and blood vessels?

The dermis is the correct answer because it is the layer of skin that is situated beneath the epidermis and is rich in connective tissue. This layer is responsible for containing a variety of structures, including nerves and blood vessels, which are essential for sensory perception and the regulation of blood flow, respectively.

The nerves within the dermis are responsible for transmitting sensations such as touch, pain, and temperature to the brain, making this layer crucial for the skin's ability to interact with its environment. Additionally, the presence of blood vessels in the dermis helps to nourish the skin cells and regulate body temperature through the mechanisms of dilation and constriction.

In contrast, the epidermis is the outermost layer of skin and primarily serves as a protective barrier. While it does contain nerve endings, it lacks the blood vessels that are found in the dermis. The hypodermis, also known as the subcutaneous layer, primarily consists of fat and connective tissue and acts as an insulator and cushion but is not the main site for nerves and blood vessels related to the skin’s functions.