title: Variation of thin filament length in heart muscles.
mesh_terms: D000818:Animals; D001001:Anura; D003187:Compliance; D008854:Microscopy, Electron; D009200:Myocardial Contraction; D009206:Myocardium / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure; D051381:Rats