. The comparative anatomy of the domesticated animals. Veterinary anatomy. CAPILLARIES IN THE VASCULAR LAYER OF THE RETINA. 'y Pigment cell of the retina connected with a rod; n, Cone seated on the membrana limitans externa, the inner seg- ment containing a cone ellipsoid, and a needle; m, /, Proper fibre con- necting rod and cone with one of the cells of the membrana fenestra, whose cells are in com- munication with the membrana limitans in- terna, m, ?, i, by means of a thick radial fibre with an oval nucleus attached; g, g, Multi- polar ganglion of nerve elements; o, p, Optic fibrilla; g, r
. The comparative anatomy of the domesticated animals. Veterinary anatomy. CAPILLARIES IN THE VASCULAR LAYER OF THE RETINA. 'y Pigment cell of the retina connected with a rod; n, Cone seated on the membrana limitans externa, the inner seg- ment containing a cone ellipsoid, and a needle; m, /, Proper fibre con- necting rod and cone with one of the cells of the membrana fenestra, whose cells are in com- munication with the membrana limitans in- terna, m, ?, i, by means of a thick radial fibre with an oval nucleus attached; g, g, Multi- polar ganglion of nerve elements; o, p, Optic fibrilla; g, r, % Supposed connection of the nucleus with prolongation of a ganglion cell. THE MEDIA OF THE EYE. The Crystalline Lens, (Fig. 383,/.) The lens, as its name implies, is a (solid) trans- parent body, sustained at the smaller circumference of the zone formed by the ciliary processes (behind the pupil, and partially imbedded in the vitreous humour). It is biconvex in shape, and flatter on its anterior than its posterior surface. We have mea- sured the lens of the Horse's eye, and find the follow- ing dimensions : vertical diameter y%-ths, and trans- verse diameter y^^ths of an inch. The posterior face is evidently more convex than the anterior, for we found the transverse diameter of the last to be x\ths, and that of the first x^o*^^ ^^ ^^ inch. Structure.—The lens is enveloped in a trans- parent membrane, the capsule, which contracts no adhesions with it. Its thickness is uniform in the Horse, and its tissue is slightly striated transversely; its internal face is lined by a layer of pavement epithelium. The projper tissue of the lens is disposed in concentric layers, which the microscope proves to be composed of fibres; the outer layers are almost fluid (gelatinous), but their consistence gradually increases towards the centre. Between the proper tissue and the epithelium of the capsule are two or three layers of round cells, whose dissolution some time after death forms the li
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
