Answers

2016-06-21T13:02:31+08:00
When you inhale, the diaphragm muscle contracts. When you exhale, the diaphragm muscle relax. The diaphragm helps the air go in and out of the lungs.
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2016-06-23T21:33:33+08:00
The movement of the diaphragm affects the air pressure inside the chest cavity byeither decreasing or increasing the space, thus allowing air to go in and out of the lungs.
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