What is referred to as the largest organ in the body?

Skin is referred to as the largest organ in the body due to its size and extensive coverage. It serves several vital functions, including protection, regulation of body temperature, sensation, and the synthesis of vitamin D. The skin acts as a barrier against pathogens and helps retain moisture within the body, which is critical for maintaining overall health.

In adults, skin can cover an area of approximately 1.5 to 2 square meters and can weigh around 9 to 11 pounds, making it not only the largest organ but also a significant component of the body's overall structure. Its role in the immune response and its ability to sense the environment further contribute to its designation as the largest organ, emphasizing its importance in human physiology.