mesonephros gonad 



Mullerian duct 



nephrrc duct 

 growing tip 



urogenital sinus 



phric duct 



iai plug 



llerion tubercle-^ 



ovarian ligament 



ovary epodphoron 



suspensory 

 ligament 



^broad ligament 

 ■"Gartner's canal 



23 mm 



B 



32.9 mm 



69 mm 



Figure 10-35. Three stages in the development of the human female reproductive tract. (After 

 Patten, 1946) 



mesonephric kidney are evidenced in the epoophoron, paro- 

 ophoron of the young, and Gartner's duct (part of the 

 nephric duct) in the early foetus. 



Like the male, the females of mammals show marked 



variations. The monotreme lacks a vagina, using the uro- 

 genital sinus and the cloaca as a copulatory tube (Figure 

 10-34). The two uteri open laterally into the urogenital 

 sinus well anterior to the cloaca. A vestigial nephric duct is 



oviduct 



B 



vaginal pouch 



urethra (dashed line) 



Figure 10-36. Female tracts of three kinds of marsupials as seen from below. A, Perame/es, B, 

 opossum; C, Halmaturus or Mocropus. (A After Grasse; B in port from Bolk et cl, 1933; C after van 

 der Broek, Bolk et al, 1933) 



322 • THE UROGENITAL SYSTEM 



