. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. DEVELOPING SEMINIFEROUS TUBULES OVARIAL SAC Fig. 350. Sex gland differentiation. (A) Transverse section through early genital rudiment on media! aspect of mesonephric kidney in the 10 mm. pig embryo. (B) Transverse section through early sex gland of the chick about middle of sixth day of incubation showing ingression of sex cord of first proliferation. Observe primordial germ cells in germinal epithelium. Compare with fig. 345G. (Redrawn from Swif
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. DEVELOPING SEMINIFEROUS TUBULES OVARIAL SAC Fig. 350. Sex gland differentiation. (A) Transverse section through early genital rudiment on media! aspect of mesonephric kidney in the 10 mm. pig embryo. (B) Transverse section through early sex gland of the chick about middle of sixth day of incubation showing ingression of sex cord of first proliferation. Observe primordial germ cells in germinal epithelium. Compare with fig. 345G. (Redrawn from Swift, 1915, Am. J. Anat., 18.) (C) Transverse section through sex gland rudiment of human embryo 11 mm. greatest length. (Redrawn and slightly modified from Felix, 1912, Chap. 19, in Human Embryology, vol. II, by F. Keibel and F. P. Mall, Lippincott, Philadelphia.) (D) Transverse section through testis of human embryo 70 mm. head-foot length. (Redrawn from Felix, 1912. For reference see C above.) (E) Section through human testis of embryo 70 mm. head-foot length, showing connection between testicular cords (developing seminiferous tubules) and developing rete tubules. (Redrawn from Felix, 1912, reference same as in C, above.) (F) Transverse section through testis of seventh month human embryo showing developing seminiferous tubules. (Redrawn from Felix, (Continued on facing page.) 790. 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 Nelsen, Olin E. (Olin Everett), b. 1898. New York, Blakiston
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