How You Breathe Out · Lungs
Stretched lung tissue springs back like a rubber band.
Lung tissue is springy. Stretch it on the way in and it wants to snap back — and that stored springiness is what pushes most of the air out again, free of charge.
There's more: stretched lung tissue springs back like a rubber band. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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