Summary
By means of polarization microscope, the submicroscopic structure of intercalated discs in auricle and ventricle muscles of rat heart were investigated using an imbibition method and precipitation anisotropic staining. The investigation proved that the protein and lipid parts in intercalated discs of auricle muscles are, on the contrary, arranged like intercalated discs of ventricle muscles.
The ultrastructural variance revealed can be explained by mechanical effects exerted by the myofibrils on the plasma membranes which separate the adjacent heart muscle cells.
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Joó, F. Über die submikroskopische Organisation der Glanzstreifen (Eberthlinien) der Vorhof- und Kammermuskulatur des Herzens. Experientia 19, 415–416 (1963). https://doi.org/10.1007/BF02171520
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DOI: https://doi.org/10.1007/BF02171520