MALE GENITAL ORGANS OF THE OX 



501 



relatively very small, and is al)out four inches (ca. 10 cm.) from the linea alba. 

 The cremaster internus is feeble. 



The spermatic cords emerge through the outer angles of the external inguinal rings, and 

 curve (lownwanl and iiiwartl to the neck of the scrotum. The external rings are about four 

 inches (ca. 10 cm.) long, and are two and a half to three inches (6 to S cm.) apart. In animals in 

 good condition there is a large masti of fat above the neck of the scrotum, between the spermatic 



^^/t 



Vesiculn seniinnlis 



Urethra {covered by urethral muscle) 



Bulbo-urethral {Coivper^s) gland 



Ureter 



^ Prostate (body) 



Fig. 400. — Internal Genital Organs of Bull; Dorsal View. 

 The right vesicula is sectioned frontally. The dotted line indicates the backward extension of the peritoneum. 



cords. The mesorchium extends to the bottom of the tunica vaginalis, forming a narrow fold 

 (ca. 1 cm. wide) which attaches the epididymis to the posterior part of the tunic. 



The inguinal canal presents several special features in the bull. The internal ring is very- 

 long. Its anterior l)order, formed by the edge of the internal oblique, is decidedly concave and 

 is tendinous in its inner part. The long axis of the external ring is directed outward, forward, and 

 downward. The spermatic cord lies in its outer part, the external pudic vessels in its middle. 

 A muscular band about an inch wide, detached from the internal oblique muscle, crosses the outer 

 side of the vaginal ring. 



The vas deferens is small in caliber. The urogenital fold is narrow, so that 

 the vasa are closer together in it than in the horse. On reaching the posterior 

 part of the bladder they are in apposition for a distance of about four inches 



