What is the largest organ in the human body?

The skin is the largest organ in the human body, accounting for about 16% of a person's total body weight. It serves as a protective barrier that shields the internal organs, regulates body temperature, and allows for sensory perception. With a surface area of around 1.5 to 2 square meters in an average adult, the skin plays a crucial role in maintaining overall health and homeostasis.

While the heart, liver, and lungs are vital organs, they do not surpass the skin in size. The heart is an essential muscular organ responsible for pumping blood; the liver is important for detoxification, metabolism, and other functions, and the lungs are crucial for respiration. However, when measuring size in terms of surface area or weight, none of these organs come close to matching that of the skin. Thus, the skin's role and size clearly establish it as the largest organ in the human body.