What is the largest organ in the body?

The largest organ in the body is the skin. It plays a critical role in protecting the body, regulating temperature, and allowing the sensation of touch, heat, and cold. In the context of the options provided, the liver is indeed one of the largest internal organs and performs essential functions such as detoxification, protein synthesis, and the production of biochemicals necessary for digestion.

The kidneys, brain, and lungs, while vital organs, do not surpass the liver in size. The kidneys are responsible for filtering blood and producing urine, the brain controls the central nervous system, and the lungs are necessary for respiration. Each has significant importance and function in the body but does not equate to the size of the liver in terms of physical mass.

Thus, while the liver is an essential organ and one of the largest, it is important to clarify that the skin is the largest organ in the body overall.