How You Breathe Out · Lungs
A normal breath uses a small fraction of your capacity.
A quiet breath moves about half a litre of air. Your lungs can hold around six. Almost all of your breathing happens in a small, comfortable slice of a much bigger range.
There's more: a normal breath uses a small fraction of your capacity. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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