BAorta, right atrium, right ventricle, pulmonary artery, lungs, pulmonary vein, left atrium, left ventricle, vena cava.
CVena cava, left atrium, left ventricle, pulmonary artery, lungs, pulmonary vein, right atrium, right ventricle, aorta.
DVena cava, right atrium, right ventricle, pulmonary artery, lungs, pulmonary vein, left atrium, left ventricle, aorta.