[Answer] When are the semilunar valves closed?

Answer: During heart relaxation

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When are the semilunar valves closed? Systole /ˈsɪstəliː/ is the part of the cardiac cycle when the ventricles contract. The term "systole" originates from New Latin from Ancient Greek συστολή (sustolē) from συστέλλειν (sustellein "to contract") from σύν (syn "together") + στέλλειν (stellein "send"). Phases of the Cardiac Cycle When the Heart Beats What is the reason why semilunar valves open? - Quora Heart valve - Wikipedia Semilunar valves are open when the blood is being pumped . The AV valves are closed when the semilunar valves are open. * Atria are relaxed * Ventricles are relaxed * Semilunar valves are closed * Atrioventricular valves are open During this phase the blood moves passively from the venous system into the … Wed Jan 23 2019 · In this cycle blood passes through the tricuspid valve first then the pulmonary valve mitral valve and finally the aortic valve...

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