What components comprise the integumentary system?

The integumentary system is primarily designed to protect the body and consists of components that serve this protective function. This system includes the skin, which acts as a barrier against environmental hazards, regulates temperature, and allows for the sensation of touch, pain, and pressure. Hair extends from the skin and provides additional protection, such as insulation against temperature changes and shielding from harmful UV radiation. Nails also originate from skin tissue and serve as a protective covering for the tips of fingers and toes, enhancing dexterity and providing support for gripping.

Understanding the constituents of the integumentary system is essential, as they play vital roles in overall health and protection against external factors. The other options consist of organ systems that do not pertain to the integumentary system. For example, the brain and spinal cord are part of the nervous system, the heart and lungs are components of the cardiovascular and respiratory systems, and muscles and tendons pertain to the musculoskeletal system. Recognizing these distinctions helps clarify the unique functions and structures comprising the integumentary system.