Answers

2014-06-17T18:07:33+08:00
Our Lungs. Our Lungs... )))))
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2014-06-17T18:12:37+08:00
When you inhale your oxygen is go to the trachea then go to the lungs when exhale your oxygen is change to the lungs is become carbon dioxide then the carbon dioxide is out to the mouth that is called exhale.

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