This medical illustration pictures the circulatory (cardiovascular) system of a newborn infant. In this drawing, the following arteries, veins and structures are labeled: brain, external carotid artery, internal carotid artery, subclavian artery, brachiocephalic artery, common carotid artery, lung, ductus arteriosus, pulmonary artery, heart, lung, inferior vena cava, umbilical artery, umbilical vein, liver, aorta and umbilicus.