Atria - Top chambers of the heart, Ventricles - Bottom chambers, Pulmonary artery - Blood away from heart and to the lungs, Pulmonary vein - Blood to the heart from the lungs, Atrioventricular valve - bicuspid, Oxygenated blood - Left side, Aorta - Blood to the body, Vena cava - Blood to right atrium, Valves in aorta and pulmonary artery - Semi lunar, Myocardium - Muscle layer of the heart,

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