title: The ultrastructure of calf heart conducting fibers with special reference to nexuses and their distribution.
mesh_terms: D000818:Animals; D002417:Cattle; D002459:Cell Fusion; D002462:Cell Membrane / Q000648:ultrastructure; D002466:Cell Nucleolus / Q000648:ultrastructure; D003094:Collagen / Q000032:analysis; D006329:Heart Conduction System / Q000648:ultrastructure*; D008297:Male; D008854:Microscopy, Electron; D009206:Myocardium / Q000032:analysis; D009940:Organoids / Q000648:ultrastructure; D013194:Staining and Labeling
chemical_list: D003094:Collagen