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2 votes
Why does the heart automatically adjust the flow of blood to match activity levels?

asked
User Orithena
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2 Answers

5 votes
Your heart is going to start bumping oxygenated blood through your body as with more exercise more oxygen is needed.
answered
User Mittal Bhatt
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9.1k points
3 votes

C.

It builds up a higher level of oxygen in the blood

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User Bohanl
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