What happens in the 3 stages of the cardiac cycle?
1. Ventri lax, atria tract , decrease atri volume, inc Press, AV open 2. Ventricles contract, Dcrease Vol , Increase pressure, AV shut , Semi Lunar open, atria relax, 3.Atri & Ventri relax, high P in cava flow passively, lower p in ventri flows pas
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