Lub Dub Sounds Systole Diastole !full! Today

"The human heart doesn't sing. It knocks. Two knocks per beat. Lub... Dub.

The marks Diastole . The ventricles relax. But wait—the blood tries to flow backward. Luckily, the pulmonary and aortic valves snap closed to stop it. That snapping echo? That’s your 'Dub.' lub dub sounds systole diastole

Systole. The chamber contracts. Pressure peaks. Blood explodes into the aorta. The mitral valve whispers goodbye as it snaps shut. This is the sound of doing . "The human heart doesn't sing