what is breathing and system
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The respiratory system is what allows us to breathe and exchange carbon dioxide for oxygen. (Image: © Shutterstock) The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide
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The respiratory system is what allows us to breathe and exchange carbon dioxide for oxygen. (Image: © Shutterstock) The human respiratory system is a series of organs responsible for taking in oxygen and expelling carbon dioxide.
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