How You Breathe In · Lungs
Muscles between the ribs that swing the chest wider.
Between each pair of ribs sit small muscles that tilt the whole ribcage up and outward — like lifting the handle of a bucket. Put your hands on your sides and take a deep breath: that widening is them.
There's more: muscles between the ribs that swing the chest wider. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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