Wound, Ostomy and Continence Nurses Society (WOCN) Practice Exam

What tissues are included in the subcutaneous layer?

1. Sweat glands and blood vessels

2. Adipose and connective tissues

3. Muscle fibers and nerve endings

4. Epidermal cells and keratin

The correct answer is: Adipose and connective tissues

The subcutaneous layer, also known as the hypodermis, is primarily composed of adipose tissue and connective tissue. Adipose tissue serves as a key energy reserve, provides insulation, and acts as a cushion for underlying structures. Connective tissue in this layer supports the skin and anchors it to underlying structures such as muscles and bones. While sweat glands and blood vessels are present in the skin, they are not exclusive to the subcutaneous layer and exist within other skin layers as well. Muscle fibers and nerve endings also serve different functions and are typically found in areas deeper than the subcutaneous layer. Epidermal cells and keratin are related to the outermost layer of skin, the epidermis, and do not reside in the subcutaneous layer. Thus, the composition of the subcutaneous layer being primarily adipose and connective tissues is what makes this answer accurate.