Why does the respiratory system need to pass oxygen to the blood?
2 answers:
It's need to pass oxygen to the blood to the respiratory system work properly I think that the answer
<span>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.
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Answer:
4.543 billion years
Explanation:
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because it needs its plasma membrane to live and if it freezes then it dies
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