Bill Nye gets aerobic about the importance of respiration when he jogs, bikes, swims, and SCUBA dives. Discover how to measure how much air each breath contains and make a model lung. See a demonstration of how cigarette smoke can infiltrate and injure lungs.The DVD has extra features: fully indexed "chapters" correlated to national science standards, interactive glossaries and quizzes, bonus footage of never-before-seen segments, interviews and demos, Spanish translation, and on-disk implementation guide. .