File:Keibel Mall 2 555.jpg

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Fig. 555. Median section of a human embryo of 50 mm head-foot length

(Embryo R. Meyer 257, from the collection of Professor R. Meyer, Berlin; slide 16, row 3, section 1.) X 8.

On the development of the genital cord the first indication of a sexual difference appears. In the male the two mesonephric folds fuse with the posterior wall of the bladder before they unite to form the genital cord, and this fusion persists also after the union. The urogenital sinus is cut lengthwise; the anterior border of its external orifice reaches already the coronary sulcus of the glans. Between the external orifice of the sinus and the anus the aboral periphery of the phallus and the perineum are beginning to form.


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Felix W. The development of the urinogenital organs. In Keibel F. and Mall FP. Manual of Human Embryology II. (1912) J. B. Lippincott Company, Philadelphia. pp 752-979.

XIX Development of the Urinogenital Organs: Excretory Glands and their Ducts | Reproductive Glands and their Duct | Urogenital Union | External Genitalia | Figures | Literature
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Cite this page: Hill, M.A. (2024, April 26) Embryology Keibel Mall 2 555.jpg. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/File:Keibel_Mall_2_555.jpg

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current08:23, 15 November 2018Thumbnail for version as of 08:23, 15 November 20181,280 × 904 (195 KB)Z8600021 (talk | contribs)
08:22, 15 November 2018Thumbnail for version as of 08:22, 15 November 20181,916 × 1,637 (437 KB)Z8600021 (talk | contribs)Fig. 555. Median section of a human embryo of 50 mm head-foot length. (Embryo R. Meyer 257, from the collection of Professor R. Meyer, Berlin; slide 16, row 3, section 1.) X 8. On the development of the genital cord the first indication of a sexual dif...

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