Title: A text-book of embryology for students of medicine (electronic resource)
Identifier: b21286991 (find matches)
Year: 1907 (1900s)
Authors: Heisler, John Clement; Waterstone, David, former owner; Duke-Elder, Stewart, 1898-1978, former owner; University College, London. Library Services
Subjects: Embryology; Embryology
Publisher: Philadelphia : W. B. Saunders Company
Contributing Library: UCL Library Services, University College London (UCL)
Digitizing Sponsor: Jisc and Wellcome Library

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260 TEXT-BOOK OF EMBRYOLOGY. majora of the vulva. The several parts of the female geni- talia develop to such a degree during the fourth month that their sexual characters at this time are well marked. if A
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Fig. 131,—Four successive stages of development of the external genital organs of the human female fetus (Tourneux): 1, clitoris; 2, glans clitoridis; 3, urino- genital fissure; 4, labia majora; 5, anus; 6, coccygeal eminence; 7, labia minora. The reader is again reminded that in the stage when the cloaca is present, the Mullerian ducts terminate in the sinus urogenitalis (Plate VII.). As previously stated, the sinus uro- genitalis becomes the female urethra, its terminal portion expanding into the vestibulum vaginae. The openings of the Mullerian ducts fall within this latter vestibular region of the sinus. The lower portion of the two ducts by this time, however, have fused to form the uterus and the vagina, and

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