How the heart works l 3D Tour of the heart

Imagine that you’ve hopped onto a red blood cell to tour the heart. You and your blood raft flow into the right atrium from the superior or inferior vena cava, the largest veins in your body. After reaching the right atrium, you have less than half a second to admire the scenery before the atrium contraction sends you down into the right ventricle. Watch this animated 3D tour of the heart to learn more about its anatomy and function. (This video includes close ups of the superior vena cava, rights and left atrium, the valves, the ventricles, the pulmonary artery/vein, lungs and alveoli)