Arterial trunk FMA:30313 fma Tubular organ part, the wall and lumen of which are continuous with those of the ventricles of the heart, directly or indirectly through branches of the aorta and pulmonary trunk. Examples: bronchial artery, hepatic artery, coronary artery, truncus anterior of right pulmonary artery, aorta. Trunk of artery Segment of arterial tree organ