Superior and Inferior Vena Cava --> Right Atrium --> Tricuspid Valve --> Right Ventricle --> Pulmonary Semilunar Valve --> Pulmonary Artery --> Lungs (Fresh O2) --> Pulmonary Veins --> Left Atrium --> Bicuspid (Mitral) Valve --> Left Ventricle --> Aortic Semilunar Valve --> Aorta --> Body --> Back to Heart

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