Which system is the outer protective covering of the body, including skin, hair, and nails?

Which system is the outer protective covering of the body, including skin, hair, and nails?

• A. Integumentary system
• B. Skeletal system
• C. Nervous system
• D. Respiratory system

Answer: (A)

The outer protective covering of the body is the integumentary system, which includes skin, hair, and nails. This system serves as a barrier that protects tissues from injury, pathogens, and water loss. The skin, with its epidermis and dermis, helps regulate temperature through sweating and blood flow, houses sensory receptors that detect touch and temperature, and, along with hair and nails, provides protection and insulation. Hair helps shield and insulate, while nails protect the fingertips and toes. Glands in the skin secrete oils and sweat to maintain moisture and temperature control. The other systems—bones for structure, nerves for signaling, and the respiratory tract for breathing—have different primary roles and do not describe the outer protective covering.

The outer protective covering of the body is the integumentary system, which includes skin, hair, and nails. This system serves as a barrier that protects tissues from injury, pathogens, and water loss. The skin, with its epidermis and dermis, helps regulate temperature through sweating and blood flow, houses sensory receptors that detect touch and temperature, and, along with hair and nails, provides protection and insulation. Hair helps shield and insulate, while nails protect the fingertips and toes. Glands in the skin secrete oils and sweat to maintain moisture and temperature control. The other systems—bones for structure, nerves for signaling, and the respiratory tract for breathing—have different primary roles and do not describe the outer protective covering.