. The eyelids and lachrymal apparatus of birds [microform]. Oiseaux; Vision; Vision; Birds. 10 Catey A. Vfood. The free margin of a portion posterior to it is set with pigment posed of delicate connective tissue interspersed with elastic flbna running in various directions. It has a firm, thickened, free mar- gin, but no hyaline cartilage cells. This latter provision enables the free border to be closely applied to the cornea, so that when it sweeps over the latter it carries with it some of the fluid secrotion of the Harderian gland and thoroughly cleans and uioistens the corneal surface. The
. The eyelids and lachrymal apparatus of birds [microform]. Oiseaux; Vision; Vision; Birds. 10 Catey A. Vfood. The free margin of a portion posterior to it is set with pigment posed of delicate connective tissue interspersed with elastic flbna running in various directions. It has a firm, thickened, free mar- gin, but no hyaline cartilage cells. This latter provision enables the free border to be closely applied to the cornea, so that when it sweeps over the latter it carries with it some of the fluid secrotion of the Harderian gland and thoroughly cleans and uioistens the corneal surface. The presence of elastic fibres gives to the third lid the qualities of a thin rubber band; when put upon the stretch it flies back instantly the moment the traction or "pull" is «, ?"'*â *âEnlarged Camera Drawings Showing tile Marginai Plait of tile Nictitating Membrane, Botti Extended and Compressed. (Wood and aion- aker.) MP. Marginai plait; NE. epltiiellum of tlie nictitating membrane: CE. conjunctival epithelium; LE, lid epithelial lining. cells, but this marginal pigmentation is much less marked in the Sparrow than in other birdsâthe Snow Goose and Ostrich, for instance. A sectio- . the third lid at right angles to the free border (sec the illustration) shows the latter to be triangulir in shape, like half an arrow-head, and to be thrown into folds both on its anterior and posterior surfaces. Interesting, also, are the basal folds of conjunctiva, somewhat like the folds of transmission of the human conjunctiva, disposed so as to allow of considerable and rapid excursions of the membrane back and forth over the 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 Wood, Casey A. (Casey Albert), 1856-1942. [Chicago? : s. n. ]
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Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbirds, booksubjectvis
