drewjhan2015 drewjhan2015
  • 14-10-2016
  • Health
contestada

what is the function of a closed heart valve

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georgiamontes55
georgiamontes55 georgiamontes55
  • 14-10-2016
As the heart contracts and relaxes, the valves opens and shuts, letting the blood flow into the ventricles and atria at alternate times.
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angelicaand0404 angelicaand0404
  • 23-10-2018

Gradpoint// They prevent blood from flowing backwards

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