The lungs are large organs that perform the essential task of gas exchange, bringing oxygen into the bloodstream and removing carbon dioxide. They fill most of the chest cavity and expand with each breath. Despite their large volume, the lungs are not the largest organ when it comes to surface area and total weight. That title belongs to the skin, which wraps around the entire body and plays roles in protection, temperature regulation, and sensory input. The lungs, while vital and expansive internally, are surpassed by the skin in size. It’s important to remember that “largest” refers not only to volume but also to surface coverage — and the skin covers every inch of you.