The closure of the atrioventricular (AV) valves at point A prevents the backflow of blood from the ventricles back into the atria during ventricular contraction.
What is systole?
Systole is the contraction phase of the heart when the ventricles pump blood. It is followed by diastole, the relaxation phase, completing one heartbeat and facilitating blood circulation through the cardiovascular system.
The closure of the atrioventricular (AV) valves at point A prevents the backflow of blood from the ventricles back into the atria during ventricular contraction (systole).
This closure ensures that blood flows in one direction, from the atria to the ventricles, facilitating the efficient and unidirectional circulation of blood through the heart.