Our heart has four total chambers. They are comprised of two upper chambers and two lower chambers, with the upper and lower doing different things. The upper chambers, known as the right and left atria, receive incoming blood from the body. Yet the lower chambers, known as the right and left ventricles, pump out blood from the heart to the body.
Our valves then serve as gatekeepers that allow proper flow with our blood and keep it going in the right direction. This is essential because if the valves did not do this our bodies could literally shut down. That is why, when even one does not operate correctly, surgery is required to fix it.