What is the largest organ in the human body?

The skin is the largest organ in the human body. It serves several vital functions, including protection against environmental hazards, regulation of temperature, and sensory perception. As an external covering, the skin can have a surface area of approximately 1.5 to 2 square meters in adults, making it significantly larger than any other organ.

While the liver, brain, and heart are also essential organs with important functions, none of them surpass the skin in terms of size. The liver is the largest internal organ and plays critical roles in metabolism, detoxification, and other processes, but it is smaller than the skin in total area. Similarly, the brain controls the body’s functions and processes information but is not as extensive in size as the skin. The heart, essential for pumping blood throughout the body, is also smaller than the skin. Understanding the skin's role can provide insight into its importance in overall health and body function.