What is the largest internal organ in the human body?

The liver is recognized as the largest internal organ in the human body. This multifunctional organ plays a vital role in various physiological processes including metabolism, detoxification, and the production of essential proteins like clotting factors. In terms of size, the liver can weigh approximately 3 pounds and has a significant volume compared to other internal organs, making it the most substantial by weight and size.

The liver's anatomical location, situated in the upper right quadrant of the abdomen beneath the diaphragm, also contributes to its designation as the largest internal organ. Its intricate structure, consisting of lobes and a network of blood vessels, further underscores its complexity and importance within the body.

Other organs such as the heart, lungs, and kidneys are crucial for survival but do not match the liver in terms of sheer size. The heart is vital for pumping blood, the lungs facilitate gas exchange, and the kidneys are essential for filtering blood and forming urine, but none of these organs surpass the liver when it comes to overall mass.