Which is the largest organ in the human body?

Many people are surprised to learn that the skin is the largest organ in the human body. In an adult it covers an area of about two square metres and can weigh around 3.5 to 5 kilograms, roughly 15 percent of body weight. The skin performs vital roles: it forms a protective barrier against germs and injury, helps regulate body temperature through sweating and blood flow, prevents water loss, and contains nerves that let us feel touch, heat, and pain. It is made up of layers, mainly the outer epidermis and the deeper dermis. When considering internal organs, the liver is the largest, weighing about 1.5 kilograms and performing hundreds of functions, including filtering the blood and processing nutrients. The skin, however, remains the champion by overall size.