. The comparative anatomy of the domesticated animals. Veterinary anatomy. Fig. CHAPTEE IV. APPAEATUS OF VISION. Designed for the perception of external images ren- dered visible by the luminous rays, the sense of sight depends upon the excitability of the optic nerve, the terminal extremity of which is expanded as a thin membrane at the back of each eye. The latter is a globular organ lodged in the orbital cavity, attached to muscles which can move it dn various directions, and protected by membranous and movable screens CELLS OP THE OLFAOTOEY knowu as the eyelids, whose play over the s
. The comparative anatomy of the domesticated animals. Veterinary anatomy. Fig. CHAPTEE IV. APPAEATUS OF VISION. Designed for the perception of external images ren- dered visible by the luminous rays, the sense of sight depends upon the excitability of the optic nerve, the terminal extremity of which is expanded as a thin membrane at the back of each eye. The latter is a globular organ lodged in the orbital cavity, attached to muscles which can move it dn various directions, and protected by membranous and movable screens CELLS OP THE OLFAOTOEY knowu as the eyelids, whose play over the surface of MUCOUS MEMBEANE. the eye is facilitated by the lachrymal fluid, which a, 5, c, After Schultze; j^. -^ ^j^^^^ ^^^gj, g^j,fg^^,g ^^^^^.^^^^2 jjjg|._ 0, e, f, After Lockhart â ' , .. , jr â â i i j^ ^i Clarke. ^â '^^ essential organ oj vision, or globe oj the eye, â will be first described; then, under the designation of the accessory portions of the visual ai:iparatus, we vcill notice the receptacle. 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 Chauveau, A. (Auguste), 1827-1917; Arloing, S. (Saturnin), 1846-1911; Fleming, George, 1833-1901. tr. New York, D. Appleton and Company
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