title: Innervation of airway smooth muscle: fine structure.
mesh_terms: D000818:Animals; D006801:Humans; D009130:Muscle, Smooth / Q000294:innervation*; D009469:Neuromuscular Junction / Q000502:physiology / Q000648:ultrastructure; D009474:Neurons / Q000502:physiology* / Q000648:ultrastructure; D012137:Respiratory System / Q000294:innervation*