title: The amount of contractile matter per myocardial cell nucleus in the rat during postnatal ontogenesis. II.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000648:ultrastructure*; D006321:Heart / Q000254:growth & development*; D009200:Myocardial Contraction; D009210:Myofibrils / Q000648:ultrastructure; D051381:Rats