The Four Chambers · Heart
The arrivals hall for oxygen-rich blood from the lungs.
Fresh from your lungs, oxygen-rich blood arrives in a room at the top left of your heart. That's the left atrium — loaded and ready to deliver.
Four pulmonary veins carry the oxygen-rich blood from the lungs into the left atrium. From there it moves through the mitral valve into the most powerful chamber of all — the left ventricle.
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