. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. Fig. Fig. 1. Longitudinal section of adult human heart muscle, showing the junction of two cells. Fig. 2. Longitudinal section of heart muscle from an adult dog, showing proto- plasmic bridges between two cells. to make out this structure, its place being taken by what correspond to the structures, which, in other tissues, are ordinarily described as protoplasmic bridges. When the heart muscle of the dog and cat is stained by the osmic acid method, the characteristic appearance of bridges as pictured by Kolossow ^) and Ga
. Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. Fig. Fig. 1. Longitudinal section of adult human heart muscle, showing the junction of two cells. Fig. 2. Longitudinal section of heart muscle from an adult dog, showing proto- plasmic bridges between two cells. to make out this structure, its place being taken by what correspond to the structures, which, in other tissues, are ordinarily described as protoplasmic bridges. When the heart muscle of the dog and cat is stained by the osmic acid method, the characteristic appearance of bridges as pictured by Kolossow ^) and Garten ^) can be distinctly made out (Fig. 2), although they have not, up to this time, been described in heart muscle. In longitudinal sections of human heart muscle tissue stained by KoLOSSow's method, the cell is seen to consist of regular deeply staining masses running in the long axis of the fibre, corresponding with what v. Koelliker has described as Muskelsäulchen. These are separated by clear unstained spaces, the undift'erentiated sarcoplasm. More careful observation reveals a definite relation between these structures. As represented in Fig. 3, the clear substance is present in every case on all sides of the fibril bundles, which are marked by the main striations present in voluntary muscle, that is, by a narrow disc (the Zwischenscheibe or Krause's membrane), and a broader band 1) A. Kolossow, Ueber die Structur des Pleuroperitonäal- und Ge- fäßepithels (Endothels). Arch. f. mikrosk. Anat, Bd. 42, 1893, p. 318. 2) S. Gasten, Die Intercellularbrücken der Epithelien und ihre Function. Arch. f. Anat. u. Physiol., Physiol. Abt., 1895, p. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Anatomische Gesellschaft. Jena : G. Fischer
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