. Anatomy, descriptive and applied. Anatomy. DEVELOPMENT OF UBINARY AND GENERATIVE ORGANS 1421 erulus. These tubules increase in number, and collectively constitute the mesonephros or Wolffian body (Figs. 1195, 1196). At the beginning of the second month this body forms an elongated spindle-shaped structure, which projects into the ccelomic cavity at the side of the dor- sal mesentery, and reaches from the septum transversum cephalad to the fifth lumbar somite caudad. The Wolffian body persists and forms the permanent kidney in fishes and amphibians, Iffian duct. ^.MilUerJan ( Stroma Ge
. Anatomy, descriptive and applied. Anatomy. DEVELOPMENT OF UBINARY AND GENERATIVE ORGANS 1421 erulus. These tubules increase in number, and collectively constitute the mesonephros or Wolffian body (Figs. 1195, 1196). At the beginning of the second month this body forms an elongated spindle-shaped structure, which projects into the ccelomic cavity at the side of the dor- sal mesentery, and reaches from the septum transversum cephalad to the fifth lumbar somite caudad. The Wolffian body persists and forms the permanent kidney in fishes and amphibians, Iffian duct. ^.MilUerJan ( Stroma Genital J of ovary, ridge. | Pr' [^ ova. -Body wall. \]\\m\ ^^^s/ i Fig. 1195.—Section of the urinogenital area of a chick embryo of the fourth day. (Waldeyer.) but in reptiles, birds, and mammals it is superseded by the metanephros, which forms the perma- nent kidney in these animals. The cephalic tubules of the Wolffian body become attached to the sexual eminence or genital ridge, from which the ovary in the female and the testicle in the male are developed. Diu-ing the development of the permanent kidneys the Wolffian bodies atrophj', and this process proceeds to a much greater extent in the female than in the male. Mullerian 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 Gray, Henry, 1825-1861; Spitzka, Edward Anthony, 1876-1922. Philadelphia, New York, Lea & Febiger
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1913
