Heart: What Makes The Lub Dub Sound In The

Shortly after the lub , the lower chambers contract to push blood out of the heart to the lungs and the rest of the body. Once the blood is pushed out, the "exit doors" must slam shut to prevent blood from leaking back into the heart.

In a healthy heart, the Lub-Dub is crisp and clean. However, doctors listen for changes in this sound to diagnose problems. what makes the lub dub sound in the heart