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How does the heart keep the blood flowing throughout the body? A: It contracts and relaxes B: It inflates and deflates C: It inhales and exhales D: It opens and closes
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How does the heart keep the blood flowing throughout the body?

A: It contracts and relaxes
B: It inflates and deflates
C: It inhales and exhales
D: It opens and closes

User Joshua Shew
by
7.9k points

1 Answer

2 votes
It contracts and relaxes!

Hope this helped u!!
User Ron Warholic
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