what is respiration?
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Answer:
In physiology, respiration is the movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction.
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Explanation:
The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration , or inhalation) and send carbon dioxide out (called expiration , or exhalation ) . This exchange of oxygen and carbon dioxide is called respiration .
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