. Elements of histology. Histology. 96 Elements of Histology. y^-\. disc of these rods or grannies forms the secondary disc, or the Layer of Flcigel. cS7. A typical niuscnlar fibre shows then, owing to the differentiation of each fibrilla into the above portions, the following layers in regular alternation throughout the thickness of the fibre: (1) 27ie dark inter- mediate disc, Dobies line, or Kraiise's membrane; (2) the transparent lateral disc ; (3) the dim transverse disc of sarcous elements. Then fol- lows another transparent lateral disc, and then again the intermediate disc. As stated a
. Elements of histology. Histology. 96 Elements of Histology. y^-\. disc of these rods or grannies forms the secondary disc, or the Layer of Flcigel. cS7. A typical niuscnlar fibre shows then, owing to the differentiation of each fibrilla into the above portions, the following layers in regular alternation throughout the thickness of the fibre: (1) 27ie dark inter- mediate disc, Dobies line, or Kraiise's membrane; (2) the transparent lateral disc ; (3) the dim transverse disc of sarcous elements. Then fol- lows another transparent lateral disc, and then again the intermediate disc. As stated above, in some fibres the line of Dobie is a double row of granules, and the transparent lateral disc contains a line of granules, Flugel's layer. The intermediate disc appears to be intimately connected with the sarcolemma; hence Krause gave it the name of a membrane. When a muscular fibre contracts during life, or when it shrinks after death, the sarcolemma shows regular bulgings between each two Krause's mem- branes ; at these latter the sarco- Fig. 66.—Three Fibrilke of Crab's Muscle, showing the successive stages from complete relaxation (?•) to complete contraction (t). (From Rtither- foi'd's " .'itructui-e and Contraction of Striped Muscular ;) b—610, The various appearances of the sarcous ele- ments; d—(l9, the appearances of Dol>ie's granules ; /, Flogel's granules; c, clear layer (lateral disc) between Flogel's granules and end of sarcous 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 Klein, E. (Edward), 1844-1925; Edkins, John Sydney, b. 1865. Philadelphia : Lea Brothers
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