Is the ventricle lumen larger during diastole, Biology

Q. Is the ventricle lumen larger during diastole or during systole?

During diastole the opposite occurs. The muscle fibers of the ventricles relax and the lumen of these chambers enlarges helping the entrance of blood, Systole is the stage of the cardiac cycle on which the ventricles contract so that the lumen of these chambers is reduced and the pressure upon the blood within them is heightened.

 

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