Question

Explain the following event of cardiac cycle with respect to type of valves and duration:

atrial systole

Answer 1

1. Type of Valves: During atrial systole, the atrioventricular (AV) valves (mitral and tricuspid) are open, allowing blood to flow from the atria into the ventricles. The semilunar valves (aortic and pulmonary) remain closed.
2. Duration: Atrial systole lasts about 0.1 seconds.