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01:27 VM 518-Heart Function VM 518-Heart Function	VM 518-Heart Function vm 518 cardiovascular system i heart function blood ventricle valve atrium lungs contraction backflow pressure aorta left circulation shuts contracts snapshot end body rest contract veins dioxide From cvmlect CVM Information Technology Center 92 plays 0

01:27

VM 518-Heart Function

From cvmlect CVM Information Technology Center 92 plays 0