20 



Animal Castration 



is the dortos which forms the scrotal tunic proper and consists 

 of thin elastic tissue and muscle. The dortos is a continuation of 

 the abdominal fascia. Under the dortos is the spermatic fascia 

 which is a continuation of the external oblique muscle. This 

 muscle is attached to the external abdominal ring. Inside is the 

 cremasteric fascia, an expansion of the cremaster muscle which 

 passes through the inguinal canal over the cord and surrounds 



Pig. 9 — Internal and External Generative Organs of the Stallion: A, Scrotum; B, 

 Skin; C, Tunica Vaginalis; D, Dortos; E, Cremaster Muscle; F, Left Vas Deferens; 

 G, Bulbons Portion of Vas Deferens; H, Vesicula Seminalis; I, Postate Gland; J, Cow- 

 pers Gland; K, Sheath; L, Meatus Urinarius; M, Retractor Muscle of Penis; N, Acceler- 

 ator Muscle Surrounding Urethra; O, 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; W, Bladder; X, Rectum. 



