THE UROGENITAL GROANS 19 



85. The adrenal gland, a yellowish wavy streak upon 

 the ventral side of the kidney, may also be seen. 

 It is a ductless gland. 



86. The two oviducts are highly convoluted white tubes. 

 They open at the cephalic end by the 



87. ostia tubae abdominales, funnel-shaped apertures 

 on the mesentery from the liver to the ventral body 

 wall, just lateral to the root of the lung. 



88. The oviduct is supported by a peritoneal membrane, 

 the mesotubarium. 



Ajter completing the study of the visceral blood-vessels 

 (page 14 ff-), slit open the cloaca and locate the openings 

 of the excretory bladder, oviducts, and ureters. 



Drawing 7. Make a drawing (x2) of the female 

 urogenital system, showing the ovary on the left, the 

 underlying organs on the right. 



2. The Male Urogenital System 



89. The testis is a yellow rounded body attached to the 

 kidney (83) along its mesial edge by a membrane, 



90. the mesorchium. At its cephalic end are fat bodies 

 (82) similar to those in the female. Note also the 

 adrenal gland (85) on the kidney, by tipping the 

 testis towards the mesial line in order to expose the 

 excretory organ. 



91. Note the numerous, extremely small vessels passing 

 along the mesorchium into the mesonephros. These 

 are the vasa efferentia. Inside the mesonephros 

 they unite with the mesonephric tubules of the kid- 

 ney so that the spermatozoa may pass into the 

 mesonephric duct (85), which, in the male, func- 

 tions both as an ureter and a gonoduct. 



