SPERMATOGENESIS INSEMINATION 



167 



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

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



FIG. 41. Section through testis of monkey. 



a, seminiferous tubules ; b, interstitial tissue ; c, 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 



