Question

what is respiration?
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Answer 1

Answer:

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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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Answer 2

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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