Answers

2016-06-21T22:38:34+08:00
Is a series of organs responsible for taking in Oxygen and expelling carbon dioxide

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2016-06-21T22:43:29+08:00
Respiratory system consist of the organs that help to breathe. respiration also know as breathing is a process which delivers oxygen from the external atmosphere to the body removes the carbon dioxide from the body and expels out
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