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Animation of a diaphragm exhaling and inhaling. Source: John Pierce via Wikipedia
Animation of a diaphragm exhaling and inhaling. Source: John Pierce via Wikipedia

Natural Selections: Breathing

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We all take thousands of breaths each day without thinking about it, yet it's one of the human body's most complex and interesting functions. Martha Foley and Curt Stager discuss what is actually happening when we breathe.

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