title: Fine structure of the atrioventricular node as viewed in serial sections.
mesh_terms: D000818:Animals; D002467:Cell Nucleus; D006329:Heart Conduction System / Q000166:cytology* / Q000294:innervation / Q000502:physiology; D007365:Intercellular Junctions; D051379:Mice; D008854:Microscopy, Electron; D008928:Mitochondria; D009431:Neural Conduction; D011689:Purkinje Cells / Q000166:cytology