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3241004551 [841]
2 years ago
10

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

Health
1 answer:
gayaneshka [121]2 years ago
3 0

Answer:

D. Organs and muscles require more blood under stress.

Explanation:

Because muscular contractions can have a protracted metabolic expenditure because it has to be adjusted to the demands of the contracting muscles.

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