It's Bill Nye the Science Guy! In this episode, Bill explores the incredible science of the heart. It's the busiest muscle in our body, its powered by electricity, and yet, we never even have to think about it.
Bill Nye the Science Guy - 76: Heart 1/3
Bill Nye the Science Guy - 76: Heart 2/3
Bill Nye the Science Guy - 76: Heart 3/3
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