. Gynecological pathology; a manual of microscopic technique and diagnosis in gynecological practice, for students and physicians. in the process of embryonal development than does the uro-genital system. We find at first the formation of the head kidney, orpronephros, with its excretory duct, the Wolffian duct. Its place is thentaken by the mesonephros, or Wolffian body, with the same excretory are replaced by the permanent kidney, or nephros, the Wolffian bodybecoming the parovarium and the duct becoming the canal of observe their close relation to the ducts of Muller (t
. Gynecological pathology; a manual of microscopic technique and diagnosis in gynecological practice, for students and physicians. in the process of embryonal development than does the uro-genital system. We find at first the formation of the head kidney, orpronephros, with its excretory duct, the Wolffian duct. Its place is thentaken by the mesonephros, or Wolffian body, with the same excretory are replaced by the permanent kidney, or nephros, the Wolffian bodybecoming the parovarium and the duct becoming the canal of observe their close relation to the ducts of Muller (tube, uterus, va-gina), and finally to the formation of the sexual gland (ovary). Already in connection with the formation of the primitive furrow adevelopment of part of the pelvic organs is observed, namely, the cloacawith its subsequent divisions, the urogenital sinus and the end intestine,and their openings, the urogenital opening (vestibulum) and the analopening. From the very beginning there is an intimate connection be-tween the end intestine and the genital and urinary passages. Vesicle Mesenteric canal Cauda or tail. Medullary plates Primitive furrow Cloacal membraneFigure 72.—Scheme of Embryonal Vesicle, Caudal End. (Waldeyer.) This may be seen in Fig. 72, which shows schematically the posteriorend of an embryo on its vesicle. The medullary plates (tori medullares)are not yet closed, so that the external opening of the neurenteric canalis visible. The following portion of the primitive furrow (sulcus primi-tivus) is closed. Posteriorly is the cloacal membrane where the anusperforates later. Anterior to this the cells of the primitive trace, through CELOM. 165 decided growth, have formed the caudal tubercle or tail. At the cloacalmembrane the intestine ends blindly. On the anterior surface appearsthe beginning formation of the allantois. Fig. 73 shows in transverse section the middle blastodermic layer of ahuman embryo, still without primary vertebrae and chorda. Thro
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectwomen, bookyear1901
