THE EPIDIDYMIS. 



281 



tubes measure six inches ; and they join the excretory duct at 

 intervals of about three inches. 



The EXCRETORY DUCT receives the vasa efferentia from the 

 upper part of the gland, and extends thence to the urethra. Its 

 first part is in contact with the testis, is very flexuous, and forms 

 the epididymis ; the re- 

 mainder is comparatively 

 straight, and is the vas 

 deferens. 



The EPIDIDYMIS (figs. 103, 

 b, and 104, Ji) extends in the 

 form of an arch along the 

 outer side of the testis, at 

 the back from the upper to 

 the lower end, and receives 

 its name from its situation. 

 Opposite the upper part of 

 the testicle it presents an 

 enlarged portion or head, 

 the globus major (y] ; and at 

 the lower end of that organ 

 it becomes more pointed or 

 tail-like globus minor (i\ 



before ending in the vas a - Lobes of the testis - 



-, ,. rr,^ ... o. Septa between the lobes, 



ferens. The intervening c Tubuli recti 



d. Mediastinum testis. 



e. Rete testis. 



/. Vasa efferentia. 

 g. Globus major. 

 h. Body, and i, 

 epididymis. 



k. Vas deferens. 

 I. Vas aberrans. 



Excretory 

 duct in 

 two parts. 



Epididymis 

 consisting 



FIG. 104. VERTICAL SECTION OP THE TESTIS 

 TO SHOW THE ARRANGEMENT OP THE 

 SEPTA AND SEMINAL TTBES. 



globus minor of the 



HORIZONTAL SECTION. 



n. Rete testis, in section, 

 o. Finer septa. 

 p. Epididymis, cut across. 

 r. Mediastinum, cut across. 



narrow part of the epidi- 

 dymis is called the body (h). 

 The epididymis is attached 

 to the testis, most closely at 

 each end, by fibrous tissue 

 and by the reflection of the 

 tunica vaginalis, the globus 

 major also being attached 

 by the vasa efferentia. 



The epididymis is formed 

 of a single tube, bent in a 

 zigzag way, the coils of 

 which are united into a 



solid mass by fibrous tissue. After the removal of the serous mem- 

 brane and some fibrous tissue this part of the tube may be uncoiled ; 

 it then measures twenty feet or more in length. The diameter of its 

 canal is about /tli of an inch, though there is a slight diminution in 

 size towards the globus minor ; but it increases again as it approaches 

 the vas deferens. 



The VAS DEFEREXS (fig. 104, k) begins opposite the lower end of 

 the testis, at the termination of the globus minor of the epididymis. 

 At first the duct is slightly wavy, but afterwards it becomes for the 

 most part a firm, round, and direct tube ; near its termination it is 

 enlarged again and sacculated, as wiD be seen later. 



of head. 



tail, 



and body; 

 how fixed ; 



formed of 

 coiled tube 



length and 

 size. 



Vas 



deferens : 



