What is the innermost layer of the skin?

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

Answer: (D)

The innermost layer associated with the skin is the subcutaneous tissue, also called the hypodermis. The surface layers are the epidermis and dermis, and the subcutaneous layer lies beneath them, anchoring the skin to underlying tissues. It’s rich in fat and connective tissue and contains larger blood vessels and nerves, providing insulation, cushioning, and energy storage. Because the subcutaneous layer sits beneath the skin and is the deepest layer connected to the integument, it is the best choice for the innermost layer.