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Sarah and Juan were running in the school track meet. The muscles in their arms and legs helped them run fast. Other muscles that you cannot see were also at work. The most important muscles for this track meet were the muscles in their A) arms. B) eye. C) feet. D) heart.

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jaidynbaker

D) Heart

I hope this helps!

Answer:

the heart

Explanation:

if u dont pump blood how are you going to move your body, the muscles act if your circulatory system is working correctly. Hope this answer helps!

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