part_of part of part of develops_from develops from develops from artery embryonic structure truncus arteriosus MESH:D014338 MA:0000103 EHDAA2:0004143 EMAPA:35887 The truncus arteriosus and bulbus cordis are divided by the aorticopulmonary septum. The truncus arteriosus gives rise to the ascending aorta and the pulmonary trunk. The bulbus cordis gives rise to the smooth parts (outflow tract) of the left and right ventricles. Wikipedia:Truncus_arteriosus_(embryology) GAID:554 NCIT:C34317 UBERON:0002061 SCTID:308828009 FMA:70301 heart blood vessel outflow tract aortic sac primitive heart tube structure with developmental contribution from neural crest