The anatomist's vade mecum : a system of human anatomy . showing the manner in which thetransverse strise are produced by the collocation of the fibrils. Nos. 1,1. The pair of highly-refractive cells; they form the dark parts ofthe single fibrils, but the bright parts of the fibre D. In the stretched fibril c,each cell has the appearance of being double. 2, 2. The pair of less refractivecells, light in the single fibrils, but forming the shaded stria in d. The trans-verse septum between these cells is very conspicuous; and in c two othersepta are seen to exist, making the number of transparent
The anatomist's vade mecum : a system of human anatomy . showing the manner in which thetransverse strise are produced by the collocation of the fibrils. Nos. 1,1. The pair of highly-refractive cells; they form the dark parts ofthe single fibrils, but the bright parts of the fibre D. In the stretched fibril c,each cell has the appearance of being double. 2, 2. The pair of less refractivecells, light in the single fibrils, but forming the shaded stria in d. The trans-verse septum between these cells is very conspicuous; and in c two othersepta are seen to exist, making the number of transparent cells four. In d,the tier of cells immediately above the dark tier is partially illumined fromthe obliquity of the light. By an error on the part of the engraver theboundary lines of the fibril are omitted in a b and 2 164 STEUCTURE OF MUSCLE. contents of tlie cell are a blastema, out of which new cells are disposition of these latter cells, in the production of fibrillee, isprobably much more simple than has hitherto been conceived. In. the muscular fibre of organic life the process would seem to stopshort of the formation of fibrillse, the cells being accumulated with-out apparent order. The corpuscles, observed by Mr. Bowman, infcetal muscle [fig. 81] and the nodosities of organic fibre, are obviouslyundeveloped cells and nuclei. Muscles are divided into two great classes, voluntary and involun-tary, to which may be added, as an intermediate and connecting link,the muscle of the vascular system, the heart. The voluntary, or system of animal life, is developed from the ex-ternal or serous layer of the germinal membrane, and comprehends thewhole of the muscles of the limbs and of the trunk. The involuntary,or organic system, is developed from the internal or mucous layer, andconstitutes the thin muscular structure of the intestinal canal, bladder,and internal organs of generation. At the commencement of thealimentary canal in the oesophagus, and near its termin
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Keywords: ., boo, bookcentury1800, booksubjectanatomy, booksubjecthumananatomy
