The elasmobranch fishes . elasmobranchfish03dani Year: 1934 Fig. 20 Fig. 208 rig. 207. Bipolar cells of cord, Pi-istiurus. (Modified from Yon Leiihossek.) a-c, stages in development of a bipolar cell; ax., axone or fiber; c, adult type of cell; , dorsal root; g., dorsal root ganglion. Fig. 208. Supporting elements, Mustelus cants. (From Houser.) A. Neurogleal cell. B. Ependymal cell. (dt.) an axone (ax.), and a large nucleus (n.); another is the bipolar type with two processes to the cell body. Figure 207 shows the development of some bipolar cells in the dorsal root ganglion of
The elasmobranch fishes . elasmobranchfish03dani Year: 1934 Fig. 20 Fig. 208 rig. 207. Bipolar cells of cord, Pi-istiurus. (Modified from Yon Leiihossek.) a-c, stages in development of a bipolar cell; ax., axone or fiber; c, adult type of cell; , dorsal root; g., dorsal root ganglion. Fig. 208. Supporting elements, Mustelus cants. (From Houser.) A. Neurogleal cell. B. Ependymal cell. (dt.) an axone (ax.), and a large nucleus (n.); another is the bipolar type with two processes to the cell body. Figure 207 shows the development of some bipolar cells in the dorsal root ganglion of An early stage (a) shows the two processes, one of which, the axone proper, passes in toward the cord; the other process extends toward the periphery. Stage (c) shows the union of the two processes to form the stem of a T. In this stage the cell appears to be unipolar or with a single process extending from it. In addition to the cells and fibers found in the central nervous system, cer- tain supporting elements are also present. The first of these are the ependymal
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