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Your heartbeat is created when the muscular walls of the heart vibrate O expand O contract O None of the above

Your heartbeat is created when the muscular walls of the heart vibrate O expand O contract O None of the above
asked 47.1k views
2 votes
Your heartbeat is created when the muscular walls of the heart

vibrate
O expand
O contract
O None of the above

asked
User Hhovhann
by
7.6k points

1 Answer

3 votes

Answer:

contract

Step-by-step explanation:

in order to pump blood it has to be pumped

answered
User Luke Briggs
by
8.4k points
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