Identifier: diseasesofkidney01kell (find matches)
Title: Diseases of the kidneys, ureters and bladder, with special reference to the diseases of women
Year: 1922 (1920s)
Authors: Kelly, Howard A. (Howard Atwood), 1858-1943 Brödel, Max, 1870-1941 Burnam, Curtis Field, 1877-
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Publisher: New York, London : D. Appleton and company

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Twenty Weeks Old. around its long axis is brought about. The lower poles at 8 weeks are estab-lished on a level with the lower border of the IV lumbar vertebra, while theupper poles reach up to the I lumbar vertebra (Fig. 61). The kidneys arealmost completely covered by the large adrenal body above and the sexual glandand Wolffian body below. The Wolffian body is already much reduced in sizeand hidden by the sexual gland. The renal pelvis is now situated on themedian surface of the kidney; in other words, the kidney has gone througha rotary movement bringing the sinus renalis or hilum toward the vertebral DEVELOPMENT OF THE PERMANENT KIDNEY. 89 column. Figure GQ gives a clear idea of this process of rotation and the stagesduring which it takes place. The axis of the renal pelvis in the earliest stagesruns in a ventro-dorsal direction mor(> or less parallel to the median plane ofthe body, the liilum lies in front. As soon as the kidneys, however, ascend over v// H ill—-^^1. \<
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Fig. 64.—The Kidney in Newborn Babe. the umbilical vessels these axes, now transverse axes of the kidney, lean morelaterally until they lose their ventro-dorsal direction completely and are directedstraight laterally. This rotation takes place between the Hth and 8th weeks.At about 9 weeks the adrenal body has, through growth of the dorsal abdom-inal wall, gained a relatively higher level and the kidney becomes visible be- 90 EMBRYOLOGY OF THE UROGENITAL APPARATUS. tween it and the descending sexual gland. On opening the abdomen of anembryo at this stage and removing the tractus intestinalis, the kidney is visiblein its lower third or half, with the exception of the outer portion, which is still

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