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