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valkas [14]
3 years ago
6

What cause the heart to pump

Health
2 answers:
Alisiya [41]3 years ago
8 0
The SA node sends out regular electrical impulses from the top chamber )the atrium) causing it to contract and pump blood into the bottom chamber (the ventricle).
tiny-mole [99]3 years ago
5 0
Blood and blood vessels
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