Il6 ANATOMY OF THE RABBIT 



absolutely necessary, as in severing the crura penis or crura 

 clitoridis from its attachment to the caudal part of the ischia. 

 Directions for dissecting the male are given on page 117. 



FEMALE RABBIT 



The cranial end of the vagina Hes against the craniodorsal 

 end of the urinary bladder between the two ureters, and ventrad 

 of the colon. The two uteri (single in man, and having a 

 single OS uteri) extend from the cranial end of the vagina 

 laterocraniad to within three cm. of the kidneys, where the 

 oviduct (uterine-, Fallopian tube) ends in a fimbriated funnel 

 which, assisted by a membranous hood, effectively envelops the 

 ovary during life, so that it is almost impossible for any 

 of the ova to escape into the coelom during passage from the 

 ovary to the funnel and oviduct. The ovary, oviduct, and 

 uterus are suspended from the dorsum of the abdominal cavity 

 by the mesovarium, mesosalpinx, and mesometrium 

 respectively. These three mesenteries, composed mainly of 

 continuous folds of the peritoneum, comprise the broad liga- 

 ment. Note the blood supply of the ovaries, uterus, and 

 vagina. 



Method: Cut the anus free from the caudal vertebrae and 

 continuing craniad loosen the entire mass of pelvic viscera and 

 evert it ventrocraniad through the incised ischial and pubic 

 symphyses into the abdominal cavity, so that the rectum and 

 vagina may be easily slit open and examined. Note the 

 strong bands of muscles forming the anal valves, the sphincter 

 ani. 



The urethra is that portion of the urinary canal between 

 the bladder and the vaginal orifice, while the continuation 

 of the urinary canal caudad to the exterior forms the urino- 

 genital (vestibulum, genitourinary) sinus, which conducts 

 products of both the urinary and the reproductive systems to 

 the exterior. . Insert the grooved director into the genitourinary 

 sinus and on into the bladder; then, with the scissors, sht the 

 genitourinary sinus and urethra along the right side from the 



