What is the term for the body system that includes the skin and its appendages?

• A. Integumentary
• B. Skeletal
• C. Muscular
• D. Lymphatic

Answer: (A)

The main idea is naming the body system that includes the skin and its appendages. The skin, along with hair, nails, and glands, belongs to the integumentary system. This system acts as a protective barrier against environmental hazards, helps regulate body temperature (through sweating and blood flow in the skin), and enables sensation via nerve endings. It also plays a role in vitamin D synthesis. The other options refer to different systems: the skeletal system involves bones and joints for support and movement; the muscular system produces movement; the lymphatic system carries lymph and supports immune function. Because skin and its appendages are part of the protective, sensory, and regulatory layer of the body, the correct term is the integumentary system.