title: Light diffraction of cardiac muscle: an analysis of sarcomere shortening and muscle tension.
mesh_terms: D000818:Animals; D001001:Anura; D006321:Heart / Q000502:physiology*; D006325:Heart Atria; D009200:Myocardial Contraction; D009206:Myocardium / Q000648:ultrastructure; D009210:Myofibrils / Q000502:physiology* / Q000648:ultrastructure; D055095:Optics and Photonics; D011894:Rana pipiens