The body system that includes the skin and acts as a protective barrier is the

The body system that includes the skin and acts as a protective barrier is the

• A. Integumentary system
• B. Digestive system
• C. Endocrine system
• D. Respiratory system

Answer: (A)

The integumentary system. The skin forms the outer protective cover of the body, acting as the first line of defense against microbes, chemicals, and UV radiation, while helping limit water loss and regulate temperature. Its epidermis, strengthened by keratin, provides a durable barrier, and sweat and oil glands add chemical defenses that deter microorganisms and support barrier integrity. Immune cells in the skin and sensory receptors further support protection by detecting hazards. Other systems have protective roles in their own contexts, but the characteristic that includes the skin and serves as the protective barrier is the integumentary system.