title: Fine structural cytochemistry of granules in atrial cardiocytes.
mesh_terms: D000818:Animals; D003594:Cytoplasmic Granules / Q000032:analysis / Q000648:ultrastructure*; D004837:Epinephrine / Q000032:analysis; D006325:Heart Atria / Q000032:analysis / Q000648:ultrastructure; D008297:Male; D008709:Methenamine; D008854:Microscopy, Electron; D009206:Myocardium / Q000032:analysis / Q000648:ultrastructure*; D009638:Norepinephrine / Q000032:analysis; D051381:Rats; D011919:Rats, Inbred Strains; D013194:Staining and Labeling
chemical_list: D008709:Methenamine; D009638:Norepinephrine; D004837:Epinephrine