title: Morphological evidence for neural control of the activity of rat heart pacemaker.
mesh_terms: D000344:Afferent Pathways / Q000502:physiology; D000818:Animals; D004525:Efferent Pathways / Q000502:physiology; D006321:Heart / Q000294:innervation*; D008854:Microscopy, Electron; D009206:Myocardium / Q000648:ultrastructure; D009474:Neurons / Q000648:ultrastructure; D010138:Pacemaker, Artificial; D051381:Rats