Answers

2016-06-16T18:06:18+08:00
When you breathe in, your respiratory system receives fresh oxygen. The oxygen first goes into your lungs and then into the left side of your heart. It is then pumped by the heart into your blood stream.
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2016-06-16T18:06:43+08:00
When you inhale oxygen , it will get through your lungs and then your lungs will now distribute the oxygen to your organs through the ciculatory system.
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