Treatise on gynaecology : medical and surgical . dremain independent of the rest of the genital aiDparatus; their excre-tory ducts, formed from a diverticulum of the Wolffian duct, openinto the bladder, and this viscus, as also the urethra, is formed at theexpense of the allantois, which is a process derived from the rectumin the foetus. That ]3ortion of the allantois which extends from theupper part of the bladder to the umbilicus forms the urachus andbecomes the superior ligament of the bladder. Two other ducts areformed parallel with those of the Wolffian body, situated above andexternal to
Treatise on gynaecology : medical and surgical . dremain independent of the rest of the genital aiDparatus; their excre-tory ducts, formed from a diverticulum of the Wolffian duct, openinto the bladder, and this viscus, as also the urethra, is formed at theexpense of the allantois, which is a process derived from the rectumin the foetus. That ]3ortion of the allantois which extends from theupper part of the bladder to the umbilicus forms the urachus andbecomes the superior ligament of the bladder. Two other ducts areformed parallel with those of the Wolffian body, situated above andexternal to them, which are called Miillers ducts; they fuse belowand open into the inferior part of the allantois below the vesical dila-tation at the place where the urethral canal is formed. The cavity VOL. II.—28 434 CLINICAL AND OPERATIVE GifN^COLOGY. where the Miillerian dncts empty communicates freely behind withthe rectum, and this junction is termed the cloaca (see Fig. 138,1and 2). Up to the third month the embryo has no sex, or rather has the. Fig. 136.—Diagram op the Development ofTHE Genito-Urinary Apparatus (Henle). 1, Em-bryonic condition; 2, feminine type; 3, masculinetype. A, Kidney; B, ureter: C, bladder; ; E, urethra; F, Wolffian body, which in themale forms the epididymis; G, excretory duct ofthe Wolffian body, whith forms the vas deferens;H, Mvillers duct which forms the tube, etc.; I,uterus, formed by fusion of Miillers ducts, whichin the male form the uterus masculinus; K, semi-nal gflands; L, primitive ligament of the kidney,which forms the round ligament of the uterus;M, uro-genital sinus; N, genital tubercle; n, n,corpora cavernosa; o, genital groove; p, Cowpersglands. elements of both sexes—its sex is indifferent and indeterminate; butat that time the internal organs begin to develop toward the mascu-line or the feminine type. If the first shall be developed, the ducts of Midler disapi)ear and MALFOKMATIONS OF THE VULVA, AjSTD HERMAPHRODISM. 435
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