Circulation Systems: of the upper body Portal system Capillary Pulmonary .Blood drains from one region circulation of the lung capillary bed to a second capillary bed before Pulmonary Pulmonary vein artery returning to the heart. Aorta Superior vena cava Leftatrium Rightatrium Left ventrice .Hepatic portal system Right ventricle vena cava drains the small large Lymph node Liver Hepatic veins Portal vein intestines,spleen,stomach Lymphatic and pancreas. vessels Portal circulation inal tract Capillary region of the lower bodyCirculation Systems: Portal system •Blood drains from one capillary bed to a second capillary bed before returning to the heart. •Hepatic portal system drains the small & large intestines, spleen, stomach and pancreas