title: Neurohistological and histochemical observations on the guinea-pig heart.
mesh_terms: D000109:Acetylcholine / Q000502:physiology; D000818:Animals; D002802:Cholinesterases / Q000032:analysis* / Q000378:metabolism; D003331:Coronary Vessels / Q000201:enzymology; D006168:Guinea Pigs; D006329:Heart Conduction System / Q000201:enzymology* / Q000502:physiology; D006351:Heart Valves / Q000201:enzymology; D006651:Histocytochemistry; D009206:Myocardium / Q000201:enzymology*; D012849:Sinoatrial Node / Q000201:enzymology
chemical_list: D002802:Cholinesterases; D000109:Acetylcholine