What is the largest organ of the body?

The skin is the largest organ of the body, serving as a protective barrier that covers and protects all internal organs and systems. It is composed of multiple layers and plays a crucial role in regulating body temperature, sensing the environment, and providing a first line of defense against pathogens and harmful substances.

The skin also has vital functions related to hydration and sensation; it contains numerous nerve endings that respond to touch, pain, and temperature. Its extensive surface area covers the entire body, making it larger than any other organ. While the liver, heart, and lungs are critical organs with specific functions, none of them come close to matching the surface area and functional diversity of the skin. Understanding the role of skin in overall health can highlight its importance in both medical assessments and treatments.