Which organ is the largest in the human body?

The skin is the largest organ in the human body, serving as a protective barrier that covers and protects the underlying tissues and organs. It plays a crucial role in regulating temperature, providing sensation, and acting as a barrier against pathogens. The skin covers the entire body and varies in thickness depending on the area, contributing to its designation as the largest organ by surface area and weight. Understanding the skin's functions emphasizes its importance not just as a protective layer, but also in overall homeostasis and bodily health.

In comparison, while the liver, heart, and lungs are also vital organs, they do not surpass the skin in terms of size or surface area. The liver is the largest internal organ, and both the heart and lungs, although important for bodily functions, are significantly smaller in size when considering the entire body.