Find out how the pacemaker cells use the movement of sodium, calcium, and potassium to get your heart beating! Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai.
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![IDK WHAT TO PLAY | IDK WHAT I WANT TO DO BUT I JUST WANT TO STREAM SO [ Lunette ch ]](https://i.ytimg.com/vi/mHt1_nvUVWE/maxresdefault.jpg "IDK WHAT TO PLAY | IDK WHAT I WANT TO DO BUT I JUST WANT TO STREAM SO [ Lunette ch ]")
