26 MUSCLES OF THE ABDOMEN 



ovary and communicating with the abdominal cavity 

 by a small opening ; its posterior end suddenly ex- 

 pands into a horn of the uterus. 



b. The Uterus consists of two horns, each begin- 

 ning from the posterior end of the Fallopian tube, and 

 a body formed by the fusion of the posterior portions 

 of the horns. The body of the uterus is directly con- 

 tinuous with the vagina. 



3. The Vagina is quite wide, and passes directly to 

 the posterior to end in the vestibule or urino-genital 

 canal. 



4. The Urethra. Immediately ventral to the vagi- 

 na lie the bladder and urethra. The latter runs 

 along the ventral wall of the vagina, and finally the 

 two unite within the pelvis to form the vestibule or 

 urino-genital canal. 



5. The Vestibule formed as stated above, lies ventral 

 to the rectum, and opens to the exterior. It has 

 very vascular walls. 



Lay open the vestibule carefully, beghuiing at the 

 exterior, and cutting along the dorsal mid-line. 



6. The Clitoris, a small organ homologous with the 

 penis of the male, is found just within the vestibule on 

 its ventral wall. It possesses essentially the same 

 structure as the penis, though on a smaller scale. It 

 has a glans clitoridis and two corpora cavernosa con- 

 nected with the ischia. 



7. Note the connection of the urethra and vagina 

 with the vestibule. 



