Answers

2016-07-20T23:44:52+08:00
Oxygen plays a crucial place to those who live. Without oxygen, for humans, blood will not be oxygenated nor non-oxygenated because the presence of oxygen is highly important to let the blood circulate in our body. And without oxygen, other kinds of gasses wouldn't be created because some air needs a particle or part from the oxygen to be called air.
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