title: The innervation of the frog's heart. 3. Electronmicroscopy of the autonomic nerve fibres and their vesicles.
mesh_terms: D000818:Animals; D001001:Anura; D005725:Ganglia, Autonomic / Q000166:cytology*; D006321:Heart / Q000294:innervation*; D006352:Heart Ventricles / Q000294:innervation; D006651:Histocytochemistry; D008854:Microscopy, Electron; D009413:Nerve Fibers, Myelinated / Q000166:cytology; D009474:Neurons / Q000166:cytology*