Skin system, contains the largest organ in the human body. Protects the body from germs, keeps in heat and moisture, and contains nerves that sense temperature, pressure, and touch

Skin system, contains the largest organ in the human body. Protects the body from germs, keeps in heat and moisture, and contains nerves that sense temperature, pressure, and touch

• A. Nervous system
• B. Endocrine system
• C. Muscular system
• D. Integumentary system

Answer: (D)

The main idea is recognizing the system that includes skin and its protective, regulatory, and sensory roles. The skin, the body’s largest organ, is part of the integumentary system, which also includes hair, nails, and glands. This system forms a barrier against germs, helps prevent water and heat loss, and contains nerve endings that sense temperature, pressure, and touch, giving us crucial sensory information. The other systems focus on different primary roles—nervous system for brain-spinal coordination and nerves, endocrine system for hormones, and muscular system for movement—so they don’t align with the full set of skin’s protective, regulatory, and sensory functions.