. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. THE URINOGENITAL SYSTEM 399 low irregular projections into the stroma, or the latter begins to penetrate the ovigerous layer at irregular distances so as to produce elevations. This condition is well illustrated in Fig. 229. In the course of development the ovigerous layer continually increases in thickness, and the projections into the stroma form veritable cords of ovigerous tissue, which correspond to the .^^. Fig. 230. — Cross-section of the ovary of a fledgling of Numenius ar- cuatus 3-4 days
. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. THE URINOGENITAL SYSTEM 399 low irregular projections into the stroma, or the latter begins to penetrate the ovigerous layer at irregular distances so as to produce elevations. This condition is well illustrated in Fig. 229. In the course of development the ovigerous layer continually increases in thickness, and the projections into the stroma form veritable cords of ovigerous tissue, which correspond to the .^^. Fig. 230. — Cross-section of the ovary of a fledgling of Numenius ar- cuatus 3-4 days old. The gerfliinal epithelium is below. (After Hoffmann.) s. c, Sexual cords. cords of Pfluger in the mammalian ovary. The cords carry the primitive ova with them. The surface of the ovary also begins to become lobulated by the extension of the stroma tra- beculae. Successive stages in the growth and differentiation of the primitive ova occur from the surface towards the inner ends of the ovigerous strands. Fig. 230 represents a section through. 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
