What is the largest organ in the human body?

The skin is the largest organ in the human body. It covers the entire body and acts as a protective barrier against injury, infection, harmful UV rays, and water loss.

The skin also helps regulate body temperature, enables the sense of touch, and produces vitamin D when exposed to sunlight. In an average adult, the skin covers about 1.5 to 2 square metres and accounts for approximately 15% of total body weight.