title: Origins of vagal preganglionic fibers to the sino-atrial and atrio-ventricular node regions in the cat heart as studied by the horseradish peroxidase method.
mesh_terms: D000818:Animals; D001283:Atrioventricular Node / Q000294:innervation*; D002415:Cats; D004525:Efferent Pathways / Q000166:cytology; D006329:Heart Conduction System / Q000294:innervation*; D006735:Horseradish Peroxidase; D008526:Medulla Oblongata / Q000166:cytology; D009433:Neural Inhibition; D012849:Sinoatrial Node / Q000294:innervation*; D014630:Vagus Nerve / Q000166:cytology*
chemical_list: D006735:Horseradish Peroxidase