During the relaxation period of the cardiac cycle, pressure in the ventricular chambers drop. This change in pressure causes blood to flow from the
A) ventricles towards the aorta and pulmonary trunk.
B) ventricles towards the atria.
C) pulmonary trunk and aorta towards the ventricles.
D) atria towards the vena cava

Question

Quizplus · Accepted Answer

During the relaxation period, also known as diastole, the pressure in the ventricles drops below that in the pulmonary trunk and aorta, causing the semilunar valves to close and preventing backflow. Blood flows from the pulmonary trunk and aorta towards the ventricles when the pressure in the ventricles is lower than in these vessels.

During the Relaxation Period of the Cardiac Cycle, Pressure in the Ventricular