dkotamarble dkotamarble
  • 13-04-2020
  • Health
contestada

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

Respuesta :

Bomarie02
Bomarie02 Bomarie02
  • 13-04-2020

Answer:

contract

Explanation:

in order to pump blood it has to be pumped

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