parasympathetic nervous system morphology trait parasympathetic ganglion morphology trait Any measurable or observable characteristic related to the shape, structure, color, or pattern of the ganglia of the parasympathetic nervous system, including the ciliary, pterygopalatine, submandibular, and otic ganglia in the cranial region and intrinsic (terminal) ganglia associated with target organs in the thorax and abdomen. Trait.ontology VT:0001034 parasympathetic ganglia morphology trait