What is the largest organ of the human body?

The skin is recognized as the largest organ of the human body, both in surface area and weight. It serves as a protective barrier covering the entire body, playing essential roles in various bodily functions, including temperature regulation, sensation, and immune defense. The skin protects internal organs from infection and injury and helps prevent dehydration by retaining moisture. Its structure consists of multiple layers, including the epidermis, dermis, and subcutaneous tissue, contributing to its significant size compared to other organs.

In contrast, the heart, liver, and brain, while vital organs with important functions, do not surpass the skin in terms of overall size or area. The heart is a muscular organ responsible for pumping blood, the liver is crucial for metabolic processes and detoxification, and the brain is the control center of the nervous system. Each of these organs plays a specific and irreplaceable role in maintaining health, but none can match the skin's extensive coverage of the body.