. An outline of the embryology of the eye [electronic resource] : with illustrations from original pen-drawings by the author. Ophthalmology; Eye; Embryology; Ophthalmology; Eye. THE EMBRYOLOGY OF THE EYE. 5 sac—the lens-sac,—which becomes detached from the external epiblast (Fig. D). The. Fig. D. anterior cells of this sac form the anterior layer of epithelium of the lens, while the cells of the posterior layer of the sac de- velop into the nucleated fibres which ex- tend forward and make up the substance of the lens. As the external epiblastic layer becomes cupped to form the lens, the dista
. An outline of the embryology of the eye [electronic resource] : with illustrations from original pen-drawings by the author. Ophthalmology; Eye; Embryology; Ophthalmology; Eye. THE EMBRYOLOGY OF THE EYE. 5 sac—the lens-sac,—which becomes detached from the external epiblast (Fig. D). The. Fig. D. anterior cells of this sac form the anterior layer of epithelium of the lens, while the cells of the posterior layer of the sac de- velop into the nucleated fibres which ex- tend forward and make up the substance of the lens. As the external epiblastic layer becomes cupped to form the lens, the distal wall of the primary vesicle is first depressed, and then, inasmuch as the vesicle continues to grow, it is gradually involuted until it comes to lie in contact with the proximal (posterior) wall. The double-walled cup thus formed is called the secondary optic vesicle (Fig. E).. 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 Holden, Ward A. (Ward Andrews); University College, London. Library Services. New York : G. P. Putnam's Sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubje, booksubjectembryology
