title: [Morphology of impulse conducting system].
mesh_terms: D000818:Animals; D004285:Dogs; D006003:Glycogen / Q000378:metabolism; D006329:Heart Conduction System / Q000033:anatomy & histology* / Q000166:cytology / Q000201:enzymology / Q000378:metabolism; D006651:Histocytochemistry; D008854:Microscopy, Electron; D012849:Sinoatrial Node / Q000033:anatomy & histology
chemical_list: D006003:Glycogen