Certified Wound Ostomy Nurse (CWON) Practice Test

What is a key characteristic of the subcutaneous tissue layer?

1. Contains collagen and elastin fibers

2. Provides insulation and cushioning

3. Is avascular

4. Is the outermost skin layer

The correct answer is: Provides insulation and cushioning

The subcutaneous tissue layer, also known as hypodermis or superficial fascia, plays a crucial role in the overall structure and function of the skin and underlying tissues. One of its key characteristics is its ability to provide insulation and cushioning. The fat cells within this layer serve to insulate the body, helping to maintain body temperature by reducing heat loss. Additionally, the subcutaneous tissue acts as a shock absorber, protecting underlying muscles and bones from external trauma. This cushioning effect is vital in preventing injuries from falls and pressure. While the presence of collagen and elastin fibers, avascularity, and being the outermost skin layer may describe different aspects of skin and tissue, these characteristics do not accurately represent the primary function associated with subcutaneous tissue. For instance, collagen and elastin fibers are more prominently found in the dermal layer; avascular characteristics pertain to certain layers of the skin but not specifically to the function of the subcutaneous layer, which is rich in blood vessels; and the outermost skin layer refers to the epidermis, not the subcutaneous tissue. Therefore, recognizing the insulation and cushioning function is essential in understanding the importance of the subcutaneous tissue layer in wound care and ostomy management.