What's the largest living organ on the human body? Answer: Skin. Bill Nye explains the naked truth about the organ that regulates our body temperature, protects our inner parts, and provides us with the sense of touch.

Originally an episode of the television program Bill Nye, the science guy. Features: fully indexed "chapters" correlated to National Science Standards; interactive glossaries and quizzes; bonus footage of never-before-seen segments, interviews, and demos; on-disk implementation guide.