title: Stereological assay of the myocardium in rats kept in conditions of weightlessness and artificially produced gravitation.
mesh_terms: D000818:Animals; D006112:Gravitation; D008954:Models, Biological; D009206:Myocardium / Q000648:ultrastructure*; D051381:Rats; D013026:Space Flight; D014893:Weightlessness / Q000009:adverse effects