. Elements of histology. Histology. 448 Elements of Histology. lose their medullary sheath, and only the transparent axis cylinder is prolonged into the retina. In man, medullated nerve fibres in the retina are very excep- tional : in the rabbit there are two bundles, whose libres retain their medullary sheath in the retina. Fk jectiou of Retina of Dog. Aflei " Anatomy.") Cajal, from Quain's u. Cone rtbre ; h, rod fibre aud nucleus ; c, d, bipolar cells â with inner nuclei, with vertical ramifications to receive the knobbed ends of the rod fibres, e,f, with flattened ramifications
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. Elements of histology. Histology. 448 Elements of Histology. lose their medullary sheath, and only the transparent axis cylinder is prolonged into the retina. In man, medullated nerve fibres in the retina are very excep- tional : in the rabbit there are two bundles, whose libres retain their medullary sheath in the retina. Fk jectiou of Retina of Dog. Aflei " Anatomy.") Cajal, from Quain's u. Cone rtbre ; h, rod fibre aud nucleus ; c, d, bipolar cells â with inner nuclei, with vertical ramifications to receive the knobbed ends of the rod fibres, e, f, with flattened ramifications for the arborising ends of the cone fibres ; g. gan- glion cell sending an axon to the outer molecular layer; /), spongioblast; 1, nerve fibres passing to the outer molecular layer ;], centrifugal nerve fibres passing into, and terminating in, inner molecular layer : m, nerve fibres passing toinner molecular layer; n, ganglion cells ; a, outer molecular layer; B, inner molecular layer; c, nerve fibre layer. (Bowman). The nerve fibres remain grouped in bundles in the retina, and even form plexuses. For obvious reasons, the number of nerve libres in the nerve fibre lay^n* diminishes towards the ora serrata. 438. (3) Tlie layer of g^sin^lion cells.âThere is one stratum of these cells only, except in the macula lutea, where they form several strata. Each. 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 work.. Klein, E. (Edward), 1844-1925; Edkins, John Sydney, b. 1865. Philadelphia : Lea Brothers