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15 cards from this deck
Sequence of events in the heart during one heartbeat
Diastole and systole
Relaxation phase - atria and ventricles are relaxed
Vena cava and pulmonary veins into atria
Open (allowing blood into ventricles)
Closed
Atria contract, pushing blood into ventricles
AV valves close, semilunar valves open
Deoxygenated blood
Pulmonary artery towards the lungs
Oxygenated blood
Aorta towards the rest of the body
Vena cava into right atrium
Pulmonary veins into left atrium
Improves efficiency and strength of the heart
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