Which organ is the largest in the human body?

The skin is indeed the largest organ in the human body. It serves several crucial functions, including protecting internal organs and regulating body temperature, as well as providing sensory information. Composed of multiple layers, the skin not only acts as a barrier against pathogens and environmental hazards but also plays a key role in the body's immune response. It has a vast surface area, which is integral for processes like thermoregulation and sensation.

While the liver, heart, and lungs are all vital organs with specific functions, they do not surpass the skin in terms of overall size and surface area. The liver is the largest internal organ, and both the heart and lungs are significant but much smaller compared to the extensive coverage that the skin provides across the entire body.