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Why does the respiratory system need to pass oxygen to the blood?

User JHoffmann
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2 Answers

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It's need to pass oxygen to the blood to the respiratory system work properly I think that the answer
User Jbasko
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So that the oxygenated blood can go through the circulatory system and pass on the oxygen to the cells in the tissues; without it the tissues will die.

Hope this helps !

Photon
User Andrei Goldmann
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