. Compendium of histology. Histology. Fig. 76.—Muscu- lar fibnlla torn across ; b, b, sarcous portion ; a, sarco- Fig. 77.—A muscular fasciculus of the frog by 800-fold enlargement; a, dark zones, with sarcous elements ; /', bright zones; c, nuclei; d. interstitial granules (alcohol preparation). absorption of water. When the sarcous por- tion has been torn by traction, the sarcolemma, or primitive sheath (Fig. j6, a), appears most distinctly. It is a hyaline, aggregated, elastic membrane. Directly superimposed on this envelope, one meets with numerous oval nuclei (Fig. JJ, c), measuri
. Compendium of histology. Histology. Fig. 76.—Muscu- lar fibnlla torn across ; b, b, sarcous portion ; a, sarco- Fig. 77.—A muscular fasciculus of the frog by 800-fold enlargement; a, dark zones, with sarcous elements ; /', bright zones; c, nuclei; d. interstitial granules (alcohol preparation). absorption of water. When the sarcous por- tion has been torn by traction, the sarcolemma, or primitive sheath (Fig. j6, a), appears most distinctly. It is a hyaline, aggregated, elastic membrane. Directly superimposed on this envelope, one meets with numerous oval nuclei (Fig. JJ, c), measuring to mm. The lateral surfaces, and the pole of the latter, are sur- rounded by a small quantity of a protoplas- matic substance (d). This, a cell rudiment, has been called a muscle corpuscle (M. Schultze). This is the condition of the human muscle. In the lower animals, however, the nucleus also lies in the interior, and the same is the case in our heart muscle. All this is readily understood. Extraordinary difficulties are, on the contrary, presented by the sub- stance surrounded by the sarcolem- ma, the sarcous elements. It is, in the first place, very changeable, and, with its infinitely delicate structure, we soon arrive at the limits of the microscopic solution possible at present. In many cases, and regularly after the use of certain reagents, the sarcous elements appear as a bundle of fine, transversely striated, elongated fibrillae, measuring I to mm. It would appear, therefore (after the manner of the connective tissue), to be a primi- tive bundle. With other methods of treatment, and also in the living muscle, we. 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 Frey, Heinrich, 1822-1890; Cutter, George R. (George Rogers), b. 1840, tr. New York, G. P. Putnams sons
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