In what system is the skin?

In what system is the skin?

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

Answer: (D)

The main concept is that the skin belongs to the integumentary system. This system includes the skin along with its appendages like hair, nails, and glands, and it serves as the body's protective barrier, helps regulate temperature through sweat and blood flow, enables sensing of touch and other stimuli, and participates in vitamin D synthesis. The nervous, endocrine, and muscular systems have different primary components—nerves, glands, and muscles—so the skin isn’t part of those systems.

The main concept is that the skin belongs to the integumentary system. This system includes the skin along with its appendages like hair, nails, and glands, and it serves as the body's protective barrier, helps regulate temperature through sweat and blood flow, enables sensing of touch and other stimuli, and participates in vitamin D synthesis. The nervous, endocrine, and muscular systems have different primary components—nerves, glands, and muscles—so the skin isn’t part of those systems.