part of overlaps continuous with larval abdominal segment larval transverse nerve neurohemal organ larval Va Capability neuron larval abdominal perisympathetic organ 2012-01-24T02:09:35Z aPSO fly_anatomy.ontology FBbt:00110117 abdominal neurohemal organ Neurosecretory organ of a larval abdominal segment, formed by the axons of Va neurons when they leave the ventral ganglion and innervate the proximal part of the transverse nerve in an anterior abdominal neuromere (Santos et al., 2007).