title: Presence of gap junctions between cardiac cells in the heart of nonmammalian species.
mesh_terms: D000557:Ambystoma; D000717:Anatomy, Comparative; D000818:Animals; D005075:Biological Evolution; D002645:Chickens; D003530:Cyprinidae; D003896:Desmosomes; D006352:Heart Ventricles / Q000166:cytology; D007365:Intercellular Junctions; D008853:Microscopy; D008854:Microscopy, Electron; D009206:Myocardium / Q000166:cytology*; D011689:Purkinje Cells / Q000166:cytology; D011817:Rabbits; D012428:Ruthenium; D013194:Staining and Labeling; D014426:Turtles
chemical_list: D012428:Ruthenium