Patient Care Technician (PCT) AAH Practice Exam

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Which layer of the skin contains adipose tissue?

  1. Epidermis

  2. Dermis

  3. Subcutaneous

  4. All layers contain adipose tissue

The correct answer is: Subcutaneous

The subcutaneous layer, also known as the hypodermis, is the layer of skin that contains adipose tissue. This layer is located beneath the dermis and serves as a cushion for the underlying structures, such as muscles and bones, while also providing insulation and energy storage due to the presence of adipose (fat) cells. The epidermis is the outermost layer of skin and is primarily composed of keratinocytes, which do not store fat. The dermis, while it contains some connective tissue and supports the epidermis, mainly consists of collagen and elastin fibers, as well as blood vessels and hair follicles, but not significant amounts of adipose tissue. The statement that all layers contain adipose tissue is inaccurate, as the adipose tissue is specifically concentrated in the subcutaneous layer. Understanding these layers and their functions is crucial for recognizing the role of adipose tissue in skin structure and overall body health.