Archive image from page 845 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( 812 THE OEGANS OF SENSE. Cornea Anterior chamber Pars iridica retinas destitute of muscular tissue, are superficial to the arteries; they are surrounded by perivascular lymph sheaths and converge to form whorls, which open into the vena? vorticosae. In the tissue between the blood-vessels are numerous stellate, flattened, and pigmented cells. The lamina choriocapillaris is composed essentially of small capillaries, which form an exceedingly close netwo
Archive image from page 845 of Cunningham's Text-book of anatomy (1914). Cunningham's Text-book of anatomy cunninghamstextb00cunn Year: 1914 ( 812 THE OEGANS OF SENSE. Cornea Anterior chamber Pars iridica retinas destitute of muscular tissue, are superficial to the arteries; they are surrounded by perivascular lymph sheaths and converge to form whorls, which open into the vena? vorticosae. In the tissue between the blood-vessels are numerous stellate, flattened, and pigmented cells. The lamina choriocapillaris is composed essentially of small capillaries, which form an exceedingly close network, embedded in a finely granular or almost homogeneous tissue. The intermediate stratum between the lamina vasculosa and lamina chorio- capillaris consists of a network of delicate elastic fibres and contains almost no pigment cells; it is lined, next the lamina choriocapillaris, with a layer of endothelium. The lamina basalis is transparent and nearly structureless. Its outer surface exhibits a trellis-like network of fibres which unite it to the lamina choriocapillaris, while its inner surface is smooth and is in contact with the pigmented layer of the retina. Tapetum.—In many animals a brilliant iridescence is seen on the postero-lateral part of the chorioid; to this the name tapetum is applied. Absent in man, it may be due, as in the horse, to a markedly fibrous condition of the stratum intermedium (tapetum fibrosum), or as in the seal, to the presence of some five or six layers of flattened iridescent cells lying imme- diately outside the lamina choriocapillaris (tapetum cellulosum). Corpus Oiliare.—The ciliary body connects the chorioid to the circumference of the iris (Fig. 683), and comprises three zones, viz.: (a) the orbiculus ciliaris, (&) the ciliary processes, and (c) the ciliary muscle. The orbiculus ciliaris is a zone of about 4 mm. in width immediately adjoining the chorioid; it exhibits numerous radially arranged ridges. Processus Ciliares. —The ciliary
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