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Ventricle lumen

Whether ventricle lumen is larger during the systole or during the diastole?

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Systole refers to the stage of cardiac cycle in which ventricles contract. Thus, the lumen of these chambers gets reduced and the pressure over the blood in them gets heightened. In diastole opposite takes place. Muscle fibers of the ventricles relax down and lumen of these chambers enlarges which is helping the entrance of the blood.

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