Colorado Cosmetology Written Practice Exam

Which term is used to describe the middle layer of the skin that contains blood vessels and nerves?

1. Dermis

2. Epidermis

3. Hypodermis

4. Stratum corneum

The correct answer is: Dermis

The correct term to describe the middle layer of the skin that contains blood vessels and nerves is the dermis. This layer is crucial as it provides structural support and elasticity due to its collagen and elastin fibers. It also plays a significant role in thermoregulation and sensation because of the presence of blood vessels, nerve endings, and various skin appendages such as hair follicles and sweat glands. In contrast, the epidermis is the outermost layer of the skin, primarily serving as a protective barrier. The hypodermis, or subcutaneous layer, lies beneath the dermis and is primarily composed of fat and connective tissue, acting as insulation and energy storage. The stratum corneum is the outermost layer of the epidermis, consisting of dead skin cells that help prevent water loss and protect underlying tissues. Therefore, the dermis is the correct answer as it specifically encompasses the critical components mentioned in the question.