Answers

2014-06-29T23:25:49+08:00
Oxygen is very important to our body, because it helps the different systems in our body like the circulatory system.our heart needs oxygen that is taken from the blood in order to live
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2014-06-29T23:42:01+08:00
Without it,cells in our body will not be able to release energy in food for power and they would die within minutes.......hope it will help..

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