[Answer] When do the AV valves open?

Answer: During heart relaxation

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When do the AV valves open? What are Semilunar Valves? (with pictures) What Are the Semilunar Valves? | MVP Resource Mitral valve - Wikipedia Wed Jan 23 2019 · During the systole phase the atrioventricular valves close and the semilunar valves open. Heart Sounds The audible sounds that can be heard from the heart are made by the closing of the heart valves. The AV valves open when the blood pressure exerted on their atrial side is greater then on the ventricle side . This happens when blood returning to the heart fills the atria and puts pressure against the valve. The four heart valves open and close in response to pressure changes that occur in the ventricles during each cardiac cycle . When the ventricles relax their pressures drop below those of the atria pulmonary trunk artery and aorta. This allows the AV valves to open as their cusps passively drop downward. Mon Oct 24 2011 · The atrioventricular valves will be open when A. Atria are in diastole and ventricles are in systole B. Pressure in the ventricles is greater than the pressure in the great arteries C. The ventricles are being passively filled D. Mon Nov 11 2019 · During the ventricular diastole period the atria and heart ventricles are relaxed and the atrioventricular valves are ope...

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