Diastole and systole

CAT 1

If you can visualize the path that blood takes through the heart and know what the heart is doing during diastole and systole, many other concepts will be easier for you to understand. The diagram below shows the path of the blood through the heart. Use this diagram and any other sources that you find appropriate to help you to understand this concept. Answer any of the following questions to show your understanding of this concept.

1.                  Describe the flow of blood through the heart.

2.                  What happens in the heart during ventricular diastole? What chambers relax and allow blood to fill the chamber? Which chambers contract and push blood out of the chamber? What valves are open during diastole? What valves are closed?

3.                  What happens in the heart during ventricular systole? What chambers relax and allow blood to fill the chamber? Which chambers contract and push blood out of the chamber? What valves are open during systole? What valves are closed?

4.                  What is occurring when you hear the S1, S2?