At first glance, many people assume the liver is the body’s largest organ because it is the largest organ inside the body. However, the correct answer is the skin. Covering the entire body, the skin has a surface area of approximately 1.5–2 square meters in adults and serves as the body’s first line of defense against injury, germs, and environmental hazards. It also helps regulate body temperature, prevents excessive water loss, and enables the senses of touch, pain, and temperature.

The liver, while smaller than the skin in overall size, is the largest internal organ. It typically weighs about 1.4–1.8 kilograms in adults and performs hundreds of essential functions. These include filtering blood, processing nutrients, producing bile to aid digestion, storing energy, and helping remove toxins from the body.

Both organs are vital to overall health, but they hold different distinctions. The skin is the largest organ overall, while the liver is the largest organ located inside the body. Together, they play critical roles in protecting the body and keeping it functioning properly.

So, the correct answer is clear: the skin is the largest organ in the human body, while the liver is the largest internal organ. It’s a common question that highlights how different ways of measuring size can lead to surprising answers.