Answers

2014-06-27T19:52:27+08:00
The heart pumps the oxygenated blood through the lungs and back o the heart again

that cycle called pulmonary circulation
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2014-06-27T22:20:06+08:00
The blood from the heart go to the lungs where there is oxygen.when is oxygen is present the blood will be oxygenated blood.Then it will back to heart and go to all over part of our body.
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