STRUCTURE OF THE TESTIS. 



555 



and perhaps also anastomosing, form a compact substance, and ter- 

 minate at the base of the lobule, either in C3ecal extremities or in 



Fig. 383. 



Structure of the testis and epididymis. a, a. Seminiferous tubes, a*, a*. Their anastomoses. 

 a. Lobules formed of the seminiferous tubes. 6. Kete testis. c. Vasa efferentia. d. Flexures of the 

 efferent vessels (cones) passing into the head (e, e) of the epididymis. /. Body of the epididymis. 

 g. Appendix (vasculum aberrans). h. Tail of epididymis. i. Vas deferens. 



loops. (Fig. 383.) Their origin in ca3cal extremities is shown by 

 Fig. 384. Though joined together by some areolar tissue and ves- 



Fig. 384. 



. Blind extremities and branches of human seminal tubes. &. One of the caeca more highly 



magnified, 



sels, the tubes in each lobule may be separated, and their length, 

 according to Lauth, is from 13 to 33 inches. Estimating the ave- 

 rage number of lobules in each testis at 175, it would contain from 



