Get your minds out of the gutter here, folks, and think
scientifically. Organs are grouped tissues that form a
functional unit. The large intestine sounds like a good
choice, until we remember that at 5 feet it's actually
shorter than the 20-foot small intestine.

The answer is something that few people realize is an
organ: the skin. If the skin of a 150-pound person were
spread out flat, it would cover approximately 20 square
feet. So stop worrying about those extra pounds at your
waistline - what's a few inches out of 20 square feet?