Biology, 22.04.2020 04:32 Animallover100

The beginning of ventricular systole is when blood flowing back toward the relaxed ventricles causes the semilunar valves to close. The beginning of ventricular systole is when blood flowing back toward the relaxed ventricles causes the semilunar valves to close. A) TrueB) False

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The beginning of ventricular systole is when blood flowing back toward the relaxed ventricles causes...