LUB- DUB Heart sound l हार्ट कैसे काम करता है #heartsound #cardiaccycle #shorts

Heart is a muscular organ that is very important organ of body. which supply blood to whole body.
Heart procuded two sound lub dub , lub dub
Lub sound is produced when atrioventricular valve ( mitral b Tricuspid valve) closed
Dub sound is produced when semilunar valves ( aortic n pulmonary) valves closed
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