POWER V PDF: LUNGS
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LUNGS
"They're squishy like sponges and stretchy like balloons. You use them every day - and night, too - no matter what you're doing. And, most likely, you never even think about them. They're you're lungs - those elastic bags with millions of tiny air pouches inside. All day long, those sacs in your chest fill and empty with the breath that feeds your body the oxygen it needs to stay alive. But, breathing isn't the only way these pouches help you be you."