Which body system includes skin, hair, and nails?

The integumentary system is the body's largest organ system, primarily composed of the skin, hair, nails, and associated glands. This system serves several critical functions, including protecting the body from external damage, regulating temperature, and facilitating sensory perception.

The skin acts as a physical barrier against pathogens and environmental hazards, while also providing waterproofing to help maintain internal fluid balance. Hair contributes to thermoregulation and provides sensory input, while nails protect the tips of fingers and toes and enhance the ability to grasp objects.

This system plays a vital role in overall health and homeostasis, influencing other systems in the body. Understanding the integumentary system helps in recognizing its significance in both medical practice and general health maintenance.