366 



THE GENITOURINARY ORGANS. 



cause corresponding evaginations of the mucosa. The mucosa, 

 which consists of fibrous connective tissue, contains flattened endo- 

 thelioid cells, which resemble nonstriated muscle-cells. The latter 

 are found only at the end of the vasa efferentia, just before reaching 

 the vas epididymidis. 



Fig. 294. Section through human vasa efferentia : a, Glands ; b, ciliated epithelium ; 

 c, glandular structure ; d, connective tissue. 



Fig. 295. Cross-section of vas epididymidis of human testis. 



The vas epididymidis is lined by stratified ciliated columnar 

 epithelium, resting on a thin mucosa, outside of which there is 

 found an inner circular and an outer, though thin and not continuous, 

 longitudinal layer of nonstriated muscular tissue. 



An aberrant canaliculus also communicates with the vas epi- 

 didymidis, and is here known as the vas aberrans HallerL Num- 



