Postganglionic Parasympathetic Fiber

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** An axon that projects from a nerve cell body within a parasympathetic ganglion and innervates an effector cell within a target organ. Postganglionic parasympathetic fibers use acetylcholine as transmitters, sometimes with peptide cotransmitters.

**Synonyms:** - Parasympathetic Fibers, Postganglionic