. Electro-physiology. Electrophysiology. XI ELECTRICAL FISHES 377 numerous (" secondary ") transverse partitions, set vertically to the long axis, into single, flat, quadrilateral chambers or compartments, lying one behind the other, and enclosing the true electromotive elements of the " plates " (Kolliker's " spongy bodies "). It appears from even superficial consideration of a long section that the single longitudinal columns of the electrical organ have in some degree replaced the involuted, cone-shaped muscle-segments, so that the primary septa are in part onl
. Electro-physiology. Electrophysiology. XI ELECTRICAL FISHES 377 numerous (" secondary ") transverse partitions, set vertically to the long axis, into single, flat, quadrilateral chambers or compartments, lying one behind the other, and enclosing the true electromotive elements of the " plates " (Kolliker's " spongy bodies "). It appears from even superficial consideration of a long section that the single longitudinal columns of the electrical organ have in some degree replaced the involuted, cone-shaped muscle-segments, so that the primary septa are in part only a restoration of the tendinous partition walls of the sacro-lumbar muscles, and, like. Fie;. -45.—Eajadavata; of electrical organ in the^tail. «-, Anterior end, lying between the layers of M. socroium&aZis (magnified three times) ; &, from the centre of the organ; the electrical plate lies at the anterior wall of each compartment. (M. Schultze.) these, form cones with pointed anterior ends, fitting parallel into one another (Fig. 245). Fig. 247 gives a good representation of the arrangement of the single compartments within the columns, as well as the position of their contents. These figures show that the comparatively thick plates, which are irregularly bounded on the posterior side, are attached to the anterior wall of each compartment, and occupy about one-third of the available inner space. Under a higher power the plates are seen (Fig. 248) to be surrounded by gelatinous connective tissue, which fixes them within the cavity of the compartment. The nerves to each compartment travel, as Kolliker (16) showed, from the anterior wall to the anterior plane, or goblet-shaped surface of the plate, forming by rapid division a rich plexus of non-medullated fibres. The true mode of ending is of course. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illus
Size: 2229px × 1121px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1890, bookpublisherlondonmacmillan
