Which layer lies beneath the dermis and is primarily composed of adipose tissue?

• A. Epidermis
• B. Dermis
• C. Hypodermis
• D. Endoderm

Answer: (C)

Under the dermis lies the hypodermis, the subcutaneous layer primarily composed of adipose tissue. This layer is full of fat cells that store energy, provide insulation, and cushion the body from impacts. It also anchors the skin to underlying structures and contains larger blood vessels and nerves. The epidermis is the outer protective layer, while the dermis is the middle supportive layer with vessels, nerves, hair follicles, and glands but not mainly fat. Endoderm is a germ layer from embryonic development, not a skin layer.