Answer:
descending colon capillary bed, complex arcades, left colic vein, superior mesenteric vein, inferior vena cava, superior vena cava, right atrium, right ventricle, pulmonary trunk, right pulmonary artery, right pulmonary capillaries, right pulmonary vein, left atrium, left ventricle, aortic arch, descending aorta (thoracic and abdominal), celiac truck, splenic artery then capillary bed of spleen