Aorta, Pulmonary artery, Vena cava, i) Blood leaves the right ventricle via pulmonary artery, ii) Carries deoxygenated blood to lung, iii) After gaseous exchange / CO2 replaced with O2 in the lung, iv) Oxygenated blood is transported to the left atrium via pulmonary vein, Prevent the backflow of blood from aorta into left ventricle, Prevent the backflow of blood from the (left) ventricle back to the (left) atrium., Sinoatrial node (SAN)., Wall of the right atrium .

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