Which organ is known as the largest organ in the human body?

The skin is recognized as the largest organ in the human body due to its extensive surface area and multifunctional role. It serves as a protective barrier, covering the entire body and playing a crucial role in protecting internal organs from physical damage, pathogens, and dehydration. Additionally, the skin is essential for regulating body temperature through sweat and insulation and plays a significant role in sensation, allowing the perception of touch, temperature, and pain.

The skin's multiple layers, including the epidermis, dermis, and subcutaneous tissue, contribute to its size and various functions. This multifunctionality and extensive coverage make the skin the most significant organ in terms of area, surpassing other organs such as the lungs, liver, or heart. Each of these other organs serves important functions—the lungs facilitate gas exchange, the liver processes nutrients and detoxifies substances, and the heart pumps blood throughout the body—but none of them cover as large an area as the skin does.