What is the largest organ in the human body?

The largest organ in the human body is the skin. It serves as a protective barrier that covers the entire body, regulating temperature and water loss, while also providing sensation and protection from environmental elements. The skin has several layers, including the epidermis, dermis, and subcutaneous tissue, all of which contribute to its overall function and size.

In contrast, while the heart, liver, and lungs are vital organs, they do not surpass the skin in area or weight. The heart is a muscular organ responsible for pumping blood, the liver is the largest internal organ with multiple metabolic functions, and the lungs are essential for respiration. Despite their importance, none of these organs can match the skin's extensive coverage and size relative to the entire body.