SPERMAT0GENP:SIS —insemination 161 



passage of exit for tlie seminal fluid or sperm-containing secretion. 

 The glandular substance of the testis is composed of the con- 



FlG. 41. — Section through testis of monkey. 



a, seminiferous tubules ; b, interstitial tissue ; o, rete testis ; rf, vasa 



efferentia ; e, vas deferens ; /, tunica albuginea. 



voluted seminiferous tubules, two or three of which join together 

 to form a straight tubule which passes into the body of the 

 mediastinum. The straight tubules within the' mediastinum 



