. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. 388 THE DEVELOPMENT OF THE CHICK of the cardinal vein, and is in contact, on its median face, with the proper nephrogenous tissue (inner zone); the latter shades into the outer zone, the cells of which are arranged concentrically with reference to the other parts. The relations subsequently established may be summarized in a few words; the inner zone of tissue grows and branches pari passu with the growth and branching of the metanephric diverticulum, so that the termina- tion of every collecting t
. The development of the chick : an introduction to embryology. Embryology; Chickens -- Embryos. 388 THE DEVELOPMENT OF THE CHICK of the cardinal vein, and is in contact, on its median face, with the proper nephrogenous tissue (inner zone); the latter shades into the outer zone, the cells of which are arranged concentrically with reference to the other parts. The relations subsequently established may be summarized in a few words; the inner zone of tissue grows and branches pari passu with the growth and branching of the metanephric diverticulum, so that the termina- tion of every collecting tubule is accompanied by a portion of. Fig. 224. — Transverse section through the ureter and metanephrogenous tissue of a 5-day chick. A. umb., Umbihcal artery. Coel., Coelome. M's't., Mesentery, n. t. i. z., Inner zone of the nephrogenous tissue, n. t. o. z., Outer zone of the nephrogenous tissue. Ur., Ureter. V. c. p., Posterior cardinal vein. W. D., Wolffian duct. the inner zone, which is, however, always distinct from it. This conclusion is established by the fact that from the start the two elements, collecting tubules and inner zone, are distinct and may be traced continuously through every stage. The outer zone differentiates in advance of the two more essential con- stituents at all stages, and thus forms a rather thick investment for them. The formation of the secreting tubules from the inner zone. 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
