. Electro-physiology . Ifffifilttffj [ilillllMMi FIG. 22.—Transverse and longitudinal sections of the muscle-fibre of Bat. Sarcoplasm clear, fibril-bundles (muscle-columns) dark. (Rollett.) with longitudinal striae, due to the alternation of sarcoplasm and muscle-columns (Fig. 22, I). In most other mammals the dark and relatively plasmic fibres are intermixed with clear fibres in the skeletal muscles. Knoll finds that the optic, masticatory, and respiratory muscles (in particular the diaphragm) are specially rich in dark fibres. In almost all vertebrates the dark are smaller than the clear fib
. Electro-physiology . Ifffifilttffj [ilillllMMi FIG. 22.—Transverse and longitudinal sections of the muscle-fibre of Bat. Sarcoplasm clear, fibril-bundles (muscle-columns) dark. (Rollett.) with longitudinal striae, due to the alternation of sarcoplasm and muscle-columns (Fig. 22, I). In most other mammals the dark and relatively plasmic fibres are intermixed with clear fibres in the skeletal muscles. Knoll finds that the optic, masticatory, and respiratory muscles (in particular the diaphragm) are specially rich in dark fibres. In almost all vertebrates the dark are smaller than the clear fibres. This is well shown in transverse sections of muscles containing both kinds of fibres (pectoral muscle of pigeon, most muscles of amphibia and mammals) (Fig. 21). Moreover, the "dark" fibres in many cases are charac- terised by their deep red colour, while the "clear" fibres are paler. The dark lateral muscles of many fish, , and the float Mud cardiac muscles, are intensely red; in Rana cscul. and temp. also, the muscles of the throat and heart are dark and red.
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublisherlondonmacmillan
