. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE IRIS AND CILIARY BODY 455 folds lamellae of mesoderm project from the stroma. These folds occur not only throughout the region of the ciliary body, but also extend into the iris region, where, however, they are but temporary structures, disappearing entirely by the end of the fifth month. The folds in the region of the corpus ciliare persist and produce the ciliary processes of the adult eye. Embedded in the substance of the iris stroma in the adult are non-striped muscle-fibers, which co
. The development of the human body : a manual of human embryology. Embryology; Embryo, Non-Mammalian. THE IRIS AND CILIARY BODY 455 folds lamellae of mesoderm project from the stroma. These folds occur not only throughout the region of the ciliary body, but also extend into the iris region, where, however, they are but temporary structures, disappearing entirely by the end of the fifth month. The folds in the region of the corpus ciliare persist and produce the ciliary processes of the adult eye. Embedded in the substance of the iris stroma in the adult are non-striped muscle-fibers, which constitute the sphincter and dila- I-Str. AE CC Fig. 271.—Radial Section through the Iris of an Embryo of 19 cm. AE, Pigment layer; CC, ciliary folds; IE, retinal layer; , iris stroma; Pm, pupillary membrane; Rs, marginal sinus; Sph, sphincter iridis.—(Szili.) tator iridis. It has long been supposed that these fibers were dif- ferentiated from the stroma of the iris, but recent observations have shown that they arise from the cells of the pigment layer of the optic cup, the sphincter appearing near the pupillary border (Fig. 271, Sph) while the dilatator is more peripheral. The Development of the Retina.—Throughout the retinal region of the cup the pigment layer, undergoing the same changes as in. 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 McMurrich, J. Playfair (James Playfair), 1859-1939. Philadelphia : P. Blakiston's son & co.
Size: 1960px × 1275px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookautho, bookcentury1900, bookdecade1910, booksubjectembryology
