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Lub Dub Circulatory system physiology

Lub Dub Circulatory system physiology 





Ever wonder why the heart sounds the way that it does? Opening and closing of heart valves makes the heart rhythm come alive with its lub dub beats... Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai.






Lub Dub Circulatory system physiology 





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