What Is The Lub Dub !full!

The "lub-dub" isn't actually the sound of the heart muscle contracting. Instead, it is the sound of

If you hear a sound like "lub-dub... lub-dub," it means the heart is pumping blood efficiently and the valves are working correctly. If a doctor hears a "whoosh" or a "click" in between, it might indicate a heart murmur or a valve issue. what is the lub dub