What happens to the diaphragm when a person breathes in or inhales?

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The diaphragm contracts
The diaphragm contracts when you inhale and when you exhale the diaphragm relax
The diaphragm contracts when you inhale and when you exhale the diaphragm relax.
* relaxes =)

Answers

2014-07-08T21:37:12+08:00

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When a person inhales, his diaphragm contracts because the lungs expand when he/she breathes in oxygen 
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2014-07-08T21:47:10+08:00

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When you inhale diaphragm contracts
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