. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. 272 THE DEVELOPMENT OF THE CHICK ness appears. The transition from the thinner lenticular to the thicker retinal zone soon becomes rather sudden in the region of the future ora serrata. About the eighth or ninth day a further differentiation arises within the lenticular zone, marking off the regions of the iris and ciliary processes (Fig. 159). The region. ep ^es p r 157 Fig. 157. — Section through the eye of a chick embryo at the beginning of the fourth day of incubation. (After Froriep.) ch.
. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. 272 THE DEVELOPMENT OF THE CHICK ness appears. The transition from the thinner lenticular to the thicker retinal zone soon becomes rather sudden in the region of the future ora serrata. About the eighth or ninth day a further differentiation arises within the lenticular zone, marking off the regions of the iris and ciliary processes (Fig. 159). The region. ep ^es p r 157 Fig. 157. — Section through the eye of a chick embryo at the beginning of the fourth day of incubation. (After Froriep.) ch. Fis. 1., Lip of the choroid fissure. Di., Lateral wall of the diencephalon. 1', \", Distal and proximal walls of the lens, st., Optic stalk. Fig. 158. — Section of the distal portion of the eye of a chick, second half of the fifth day of incubation. (After Froriep.) c. ep. int., Internal epithelium of the cornea. Corn, pr., Cornea propria. Ect., Ectoderm, ep., Epidermis, ir., Iris, mes., Meso- derm, Pigment layer of the optic cup. r., Retinal layer of the optic cup. of the iris is a narrow zone bounding the pupil in which the two layers of the optic cup become blended so that pigment from the outer layer invades the inner layer; the epithelia are decidedly. 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 Lillie, Frank Rattray, 1870-1947. New York : Henry Holt
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Keywords: ., bookauthorlilliefrankrat, bookcentury1900, booksubjectembryology
