What Produces The Lub Dub Heart Sounds !!install!! -

The ventricles contract. This spikes the pressure inside the ventricles rapidly. Inside the heart, there are four valves. The two inlet valves—the (right side) and the Mitral (left side)—are open, allowing blood to sit in the ventricles.

However, the aorta and pulmonary artery are still under high pressure; they are swollen with the blood that was just ejected. Blood is lazy; it wants to flow backward into the low-pressure ventricles. what produces the lub dub heart sounds

Here is a deep dive into the mechanics, physics, and physiology that produce the first and second heart sounds. The ventricles contract