228 THE PHYSIOLOGY OF REPRODUCTION 



A branch from one of the vesical arteries accompanies the 

 vas deferens, and eventually enters the testis, where it anas- 

 tomoses with the spermatic artery. The vas deferens, near its 

 termination, becomes sacculated, and in this region is known as 

 the ampulla of Henle. In the walls of the ampulla there are 



f/ 



FIG. 53. Passage of convoluted seminiferous tubules (a) into straight tubules, 

 and of these into rete testis (r), (after Mihalkowicz, from Schafer) ; b, 

 fibrous stroma continued from mediastinum. 



a number of small tubular glands, which doubtless supply some 

 portion of the ejected fluid. 



Disselhorst l believes that the ampulla acts as a seminal 

 reservoir (a function which has also been assigned to the 

 vesiculae seminales, as described below), and states that he has 



1 Disselhorst, " Ausfiihrapparat und Anhangsdriisen der Mannlichen 

 Geschlftchtsorgane," Oppel's Lehrbuch der V rgleichenden Mikroecopischen 

 Anatomie der Wirbeltiere, vol. iv., Jena, 1904. 



