develops_from develops from adjacent_to adjacent to adjacent to cardiac neural crest cardiac septum pulmonary trunk outflow tract septum dorsal aorta aortico-pulmonary spiral septum CALOHA:TS-2409 EHDAA2:0000136 EHDAA:2592 EMAPA:16827 The spiral septum that separates the truncus arteriosus into a ventral pulmonary trunk and the dorsal aorta[MP]. The aorticopulmonary septum is developmentally formed from neural crest, specifically the cardiac neural crest, and actively separates the aorta and pulmonary arteries and fuses with the interventricular septum within the heart during development. The actual mechanism of septation of the outflow tract is poorly understood, but is recognized as a dynamic process with contributions from contractile, hemodynamic, and extracellular matrix interactions. UBERON:0005999 UBERON:0006207 VHOG:0000502 aortic septum aortico-pulmonary septum aorticopulmonary septum septum aorticopulmonale spiral septum uberon neural crest-derived structure