THE rUTORIS 



KMl 



extremity of oach is posterior and cxtcmls liaekwards nearly to the posterior com- 

 missure, toiiehinjf the <flan<l of IJartholiii. Tlie narro\v anterior extremity, the 

 pars intermedialis of Kol)eh, runs forwards to meet its fellow of tiie opjt(»site 

 sidi- Ix'neath the elitoris. Superiorly, it is tixed to the supertieial trianjiiular lij^ament 

 of the perinoeum, while it is in relation internally to the urethral and vaginal 

 orifices, and externally is invested by the fibres of the bulbo-cavernosus. It 

 consists of erectile tissue, enveloped by a thin tunica albuginea. During the 

 condition of engorgement it helps to narrow the vestibular portion of the vulva and 

 the entrance of the vagina. 



The vessels and nerves of the clitoris and bulbi vestil)uli are the same as those 

 of the analogous parts of the male. 



Fig. 633. — Section of the Female Pelvis. (Alter Henle.) 

 a- 



VESICAL WALL 



CAVITY OF BLADDER 



Prevesical fat 



Deep tiansver 

 sua perinaei 



RECTUM 



COCCYX 



Reoto-coecy- 

 geal muscle 

 POSTERIOR LIP OF OS 



UTERI 

 ANTERIOR LIP 



VAGINA 



External 

 sphincter ani 



Internal 

 sphincter ani 



^'^if^^^rie^'^^' 



UBIUM MAJUS / 

 TTnstriped muscular fibre 



URETHRA 



LAB'UM MINUS 



Unstriped muscular fibre 



VAGINAL 



ANUS 



Internal sphincter ani 

 Fart of external sphincter ani 



Vess-'l 



ORIFICE 



The muscles appendeil to the erectile structures again are v«rv similar to those 

 descril>ed in coniiretion with tlie penis. The ischio-cavernosi are itlentical in 

 attachments with the erectores ])enis; but the bulbo-cavernosi are se))arated in 

 tile middle line by the vulvar fissure, and ap])ear on each side as a drlicate. and 

 sometimes very indistinct, plane of muscular fibres, called the constrictor vaginae, 

 attached behind to the tendinous centre of the i)erina?um, and bnaking u|> in front 

 into tendinous slips which run in close external relation to the bull)i vestibuli, 

 and become lost above and below the clitoris. Their function is to compress the 

 bulbs and to constrict the vestibule and vaginal orifice. The transversi perinaei 

 have the same connections as in the male. 



THE URETHRA (figs. G3o, G34). — The female Urethra represents only the upper 

 ti6 



