When your electrical system is working normally, the two upper chambers of the heart (atria) contract and pump blood into the two lower chambers (ventricles) in a well-coordinated way. This results in ...
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Build apps on iOS, Android, the web, and desktop with Flutter in 100 seconds! An ICE raid disrupts life on Martha’s Vineyard The 9 biggest wastes of money at the grocery store The U.S. Economy Is ...
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