The ___________ is comprised of skin and serves as a protective covering:

• A. Nervous system
• B. Integumentary system
• C. Circulatory system
• D. Excretory system

Answer: (B)

Think about the body’s outer layer as a protective shield. The system that centers on that layer is the integumentary system, which is made up primarily of the skin and its appendages. Its main job is to protect interior tissues from injury, pathogens, and dehydration, while helping regulate temperature and provide sensory information. That protective, skin-based coverage is exactly what the statement describes, making this the best fit. Other systems have different roles: the nervous system handles sensation and coordination, the circulatory system carries blood, and the excretory system removes waste; none of them describe a protective covering made of skin.