Circulation Systems: of the upper body Pulmonary Circulation Right ventricle pumps Capillary Pulmonary region circulation deoxygenated blood into the of the lung pulmonary trunk Pulmonary Pulmonary vein artery Pulmonary arteries distribute Aorta Superior blood to the capillary beds in vena cava Left atrium Right atrium the lungs where gas exchange Left ventrice Right ventricle vena cava occurs Lymph node Liver Hepatic veins Portal vein Pulmonary veins return oxygenated blood to the left Lymphatic vessels Portal circulation atrium of the heart Gastrointes tinal tract Capillary region of the lower bodyCirculation Systems: Pulmonary Circulation • Right ventricle pumps deoxygenated blood into the pulmonary trunk • Pulmonary arteries distribute blood to the capillary beds in the lungs where gas exchange occurs • Pulmonary veins return oxygenated blood to the left atrium of the heart