Answers

2016-06-27T15:57:43+08:00
Lungs are complex organs but what they do is take a gas that your body needs to get rid of (carbon dioxide) and exchange it for a gas that your body can use (oxygen)
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2016-06-27T17:41:09+08:00
Lungs work by helping us breathe, you inhale oxygen and exhale carbon dioxide.

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