18 



ANIMAL CASTRATION 



Siiermatie veins, spermatic artery, nerves, vas deferens, lympliaties, cre- 

 master ninsele and tunica vaginalis. The vas deferens is sitnated in tlie 

 posterior part of tlie cord arid is enclosed in a special fold detached from 

 the inner surface of the tunica vaginalis. 



Testicle — The testicle is a compound tubular gland, ovoid in form, sus- 



^ 



!/ / 



Fig. !i- - liilcinal and external generative organs of the stallion. A, Scromiu; B. 

 skin; C. tunica vaginalis; D, dartos; E, cremaster muscle; F, left vas deferens; 

 G. bulbous portion of vas deferens; H, vesicula seminalis; I. prostate gland; .J.Cow- 

 per's gland; K, sheath; L. meatus urlnarius; M, retractor muscle of penis; N. ac- 

 sslerator muscle surrounding urethra; 0, erector penis muscle; P. glans penis; 

 Q. corpus cavernosum; R. right internal abdominal ring; S. left internal abdominal 

 ring; T. symphysis pubis; U, peritoneal fold through which the spermatic blood- 

 vessels and nerves pass; V. right vas deferens; V7, bladder; X, rectum. 



j)ended hy the s])crmatic coi'd and occui)ying sjiacc in Ihe scrotum, in- 

 guinal canal 01- al)domina] cavity. When in eitiier the scrotum or 1hc in- 

 guinal canal it is containetl in a sac known as the tunica vaginalis. 



