. Comparative anatomy. Anatomy, Comparative. THE UROGENITAL SYSTEM 437 sinus. The septum, which is completed during the seventh week, becomes the perineum of the adult. After the septum is formed the mesonephric ducts and ureters retain their connexion with the urogenital sinus. Even NEPHROGENIC TISSUE. Fig. 363.—A diagram illustrating the repeated branching of the collecting tubules in a nine weeks (30 mm.) human embryo. The diagram also shows the origin of secretory tubules from the nephrogenic tissue. (Redrawn from Braus, after Kampmeier.) before the development of the septum is completed,
. Comparative anatomy. Anatomy, Comparative. THE UROGENITAL SYSTEM 437 sinus. The septum, which is completed during the seventh week, becomes the perineum of the adult. After the septum is formed the mesonephric ducts and ureters retain their connexion with the urogenital sinus. Even NEPHROGENIC TISSUE. Fig. 363.—A diagram illustrating the repeated branching of the collecting tubules in a nine weeks (30 mm.) human embryo. The diagram also shows the origin of secretory tubules from the nephrogenic tissue. (Redrawn from Braus, after Kampmeier.) before the development of the septum is completed, in an 11 mm. embryo, the urogenital sinus becomes subdivided into a vesico-urethral portion into which the ureter and mesonephric ducts enter, and a phallic portion CONNECTIVE TISSUE CAPSULE NEPHROGENIC TISSUE -COLLECTING TUBULE. 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 Neal, Herbert V. (Herbert Vincent), 1869-1940; Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : P. Blakiston's Son
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