File:A system of gynecology (1887) (14782961095).jpg

Identifier: system01mann (find matches)
Title: A system of gynecology
Year: 1887 (1880s)
Authors: Mann, Matthew D. (Matthew Darbyshire), 1845-1921
Subjects: Women
Publisher: Philadelphia, Lea brothers & co.
Contributing Library: Yale University, Cushing/Whitney Medical Library
Digitizing Sponsor: Open Knowledge Commons and Yale University, Cushing/Whitney Medical Library

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tending to the outlet of the cloaca, the so-called geni-tal furrow. From the fifth to the tenth week the cloaca becomes sepa-rated, as described above, into an anterior or urogenital part, the sinusurogenitalis, and a posterior or rectal part. Up to the tenth week thesexes cannot be distinguished, but henceforth the peculiarities of eachappear. The genital folds grow to be the labia majora ;3 the edges of 1 Although it would be gratifying to the aesthetic and moral sense to put this wordin a particular relation to Hymen, the god of marriage, it simply means a membrane(ini, >■). 2 Classic Latin, but in ancient times often comprising the whole genital canal. 3 Latin, labium, lip. LITERATURE. 93 the genital furrow are developed as the labia minora; and the genitaleminence becomes the clitoris,1 round which is thrown a fold from the labia minora forming its prepuce.3 The sinus urogenitalis remains inthe shape of the vestibule. The posterior part of the genital folds Fig. 34. Fig. 35.
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Fio. 34.—Formation of the External Genitals in Mankind. 1, lower portion of the trunk of anembryo from the eighth week, double size: e, gland or point of the genital eminence;/, gen-ital furrow leading buck to an aperture which at this period communicates with the rectum,and consequently is a cloacal opening; W, genital folds; g, caudal extremity of the body ;n, umbilical cord. 2, from a Female Embryo about m weeks old and l inch and 2 lineslong: i, anus; ug, entrance to sinus urogenitalis; n, edges of genital furrow or labiaminora. The other letters as in 1 (Kolliker). Pig. 35.—1, from an Embryo 1 inch long, double size, representing a stage that precedes Fig. 34;J, the sex i^ not yet distinguishable. -. from a Male Embryo from the end of the thirdmonth, 2 inches and 1 • lines long. Letters as in Fig. 34. In - the genital furrow is closed,forming the raphe u) of the penis, scrotum, and perineum (Kolliker). grow together, forming the perineum,3 which above unites with thepartiti

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