628 



REPRODUCTIVE ORGANS. 



ever, which is connected with it, has ciliated epithelium. Ciliated 

 columnar and non-ciliated cubical epithelium line the vasa 

 efferentia. 



Vas Deferens (Fig. 406). This duct, the excretory duct of the 



'frrs"- 



FIG. 409. Sagittal section through the ampulla of the right vas deferens and 

 ejaculatory duct : 1, ampulla of vas deferens ; 2, ejaculatory duct : 3, seminal 

 vesicle dissected away in its middle portion; 4, its opening into the ejaculatory 

 duct ; 5, bladder ; 6, urethra ; 7, prostate ; 8, verumontanum. 



testis, has a thick muscular wall. Its lining epithelium is partly 

 simple ciliated columnar, and partly stratified ciliated columnar, 



FIG. 410. Seminal vesicles and vasa deferentia, posterior view: 1, bladder; 2, 

 prostate; 3, 3', seminal vesicles; 4, 4', vasa deferentia; 5, ejaculatory ducts; 6, 6', 

 ureters; 7, 7, peri vesicular cul-de-sac of peritoneum; 8, interdeferential triangle, in 

 direct relation with the rectum, from which it is separated only by the prostato- 

 peritoneal aponeurosis. The two crosses (+ -f ) indicate the points at which the 

 ureters disappear in the vesical wall (Testut). 



though the cilia are sometimes absent. At the base of the bladder 

 this duct lies between it and the rectum, and here presents an 



