Question

During atrial systole, the atria _______ while the ventricles are _______. The AV valves are ______, while the semi lunar valves are _______. Blood enters the ventricles through the _________.

Answer 1

During atrial systole, the atria contract and push blood into the ventricles while the ventricles are relaxed and fill with blood from the atria. The AV valves are open, while the semilunar valves are closed. Blood enters the ventricles through the atrioventricular valves.

Step-by-step explanation:

During atrial systole, the atria contract and push blood into the ventricles, while the ventricles are relaxed and fill with blood from the atria. The AV valves (atrioventricular valves) are open during this phase, allowing blood to flow from the atria to the ventricles. On the other hand, the semilunar valves are closed, preventing the backflow of blood into the atria or the major arteries. Blood enters the ventricles through the atrioventricular valves.