What is the largest organ of the human body?

The skin is recognized as the largest organ of the human body due to its extensive surface area and crucial role in protecting the body's internal systems. Comprising multiple layers, the skin serves several important functions, including acting as a barrier against pathogens, regulating body temperature through sweat and blood flow, and allowing for sensory perception through nerve endings.

In terms of size, the average adult's skin can cover approximately 18 square feet and accounts for about 15% of total body weight, significantly surpassing other organs. While the liver, heart, and brain each have their own essential functions and sizes, none of them comes close to the skin when it comes to overall surface area and weight contribution. Hence, the identification of the skin as the largest organ effectively reflects both its size and its vital role in maintaining overall health and homeostasis.