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  • 16-04-2017
  • Biology
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What happens when you draw in or exhale air?

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Amanda1000
Amanda1000 Amanda1000
  • 16-04-2017
When you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. This increases the space in your chest cavity, into which your lungs expand. The intercostal muscles between your ribs also help enlarge the chest cavity. They contract to pull your rib cage both upward and outward when you inhale
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