Cardiac muscle: an attempt to relate structure to function.
D000818:Animals; D006321:Heart / Q000033:anatomy & histology / Q000187:drug effects / Q000502:physiology*; D008854:Microscopy, Electron; D009200:Myocardial Contraction; D009206:Myocardium / Q000648:ultrastructure; D012964:Sodium / Q000494:pharmacology; D013045:Species Specificity
D012964:Sodium