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Today I had a biology session with a student in honors biology and we spent our time covering the blood flow through the heart and the different anatomical structures of the heart. We did an exercise imagining we were a single red blood cell (RBC) floating around in the bloodstream, starting in the inferior vena cava we named all of the structures we passed as we made our progression out to the muscles. We made our way from inferior vena cava, one of the major blood vessels returning to the heart, into the right atrium. On the out side of the right atrium is the sinoatrial node (SA node) which will stimulate contraction of the heart and propel us into the next chamber. We fly through the tricuspid valve and into the right ventricle. The heart contracts again and we are pushed out through the pulmonary valve into the left pulmonary artery, remember that the right and left pulmonary arteries branch off from a common blood vessel soon after the blood leaves the right ventricle... read more

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