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 and protects the internal structures and organs from environmental hazards, pathogens, and moisture loss. The skin consists of multiple layers, including the epidermis, dermis, and hypodermis, each with specific functions—such as sensation, thermoregulation, and immune response.

In terms of surface area, the skin can cover about 20 square feet in an average adult, making it significantly larger than other organs. Understanding the skin's size and vital roles emphasizes its importance not only as a physical covering but also in various physiological processes.