How You Breathe In · Lungs
The dome of muscle that does most of your breathing.
Under your lungs sits a sheet of muscle shaped like a dome, separating your chest from your belly. When it contracts it flattens downward — and that one movement drives about three-quarters of a normal breath.
There's more: the dome of muscle that does most of your breathing. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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