. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE EYfJ. 823 covered by a very thick layer of pigment named the uvea: portions of which, supported by a small pedicle, frequently pass through the pupillary aperture and appear in the anterior chamber of the eye, where Fig. THE EYE (human) WITH THE SCLEROTIC COAT REMOVED. Ij Sclerotic coat; 2, Veins of the choroid; 3, Ciliary nerves; 4, Veins of the choroid; 5, Ciliary ligament; 6, Iris. they are known as ** soot-balls" or corpora nigra. (There are frequently several of these black spongy masses, which are g
. The comparative anatomy of the domesticated animals. Veterinary anatomy. TEE EYfJ. 823 covered by a very thick layer of pigment named the uvea: portions of which, supported by a small pedicle, frequently pass through the pupillary aperture and appear in the anterior chamber of the eye, where Fig. THE EYE (human) WITH THE SCLEROTIC COAT REMOVED. Ij Sclerotic coat; 2, Veins of the choroid; 3, Ciliary nerves; 4, Veins of the choroid; 5, Ciliary ligament; 6, Iris. they are known as ** soot-balls" or corpora nigra. (There are frequently several of these black spongy masses, which are generally attached to the upper border of the pupil; on the lower margin, when present, they are much smaller. Their colour is a brownish-black. They are sometimes so large as to give rise to apprehensions of injury to the vision.) The larger circumference of the iris is attached to the ciliary liga- ment, which unites it to the choroid; it is also related to the margin of the cornea, as well as to that of the* sclerotic opening. The lesser, or internal circum- ference, is elliptical, and circum- scribes the pupillary aperture. Stkucture.—The organisation of the iris has been much dis- cussed ; but at present it is ad- mitted that its principal element is unstriped muscular fibre. A proper membrane and two epi- thelial layers enter into its form- ation. The proper membrane has, for its framework, circular or radia- ting fasciculi of wavy connective tissue, with pigment cells. Be- tween the fasciculi are placed the «> Sphincter of the pupil; 6, by Radiating fasciculi unstriped fibres: these are disposed ?^ ^^^^^""^^ muscle; c, c, Connective tissue with • 1 ' T .1 its corpuscles. m a circular manner around the ^ pupil to constitute the pupillary sphincter, and others radiate from the lesser. 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
Size: 1938px × 1289px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectveterinaryanatomy
