. The anatomy of the domestic animals. Veterinary anatomy. »bS THE SENSE ORGANS AND SKIN OF THE HORSE THE RETINA The retina or nervous tunic of the eyeball is a delicate membrane which extends from the entrance of the optic nerve to the margin of the pupil. It consists of three parts. The large posterior part, which alone contains the nervous elements, including the special neuro-epithelium and the optic nerve-fibers, is termed the pars optica retinae. It extends forward to the ciliary body, where it terminates at an almost regular circular line called the era ciliaris retinae.' Here the retin
. The anatomy of the domestic animals. Veterinary anatomy. »bS THE SENSE ORGANS AND SKIN OF THE HORSE THE RETINA The retina or nervous tunic of the eyeball is a delicate membrane which extends from the entrance of the optic nerve to the margin of the pupil. It consists of three parts. The large posterior part, which alone contains the nervous elements, including the special neuro-epithelium and the optic nerve-fibers, is termed the pars optica retinae. It extends forward to the ciliary body, where it terminates at an almost regular circular line called the era ciliaris retinae.' Here the retina rapidly loses its nervous elements, becomes much thinner, and is continued over the ciliary body and the jjosterior surface of the iris Ity two layers of epithelial cells as the pars ciliaris retinae; the inner stratum is non-pigmented, while the outer layer is a direct continuation of the stratum pigmenti of the pars optica. The pars iridica retinae is a layer of pigmented cells which covers the posterior surface of the iris. In the dead subject the pars optica is an opaque, gray, soft membrane which. 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 Sisson, Septimus, 1865-1924. Philadelphia, London, W. B. Saunders Company
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