500 



MALE GENITAL ORGANS OF THE OX 



!« 



MALE GENITAL ORGANS OF THE OX 



The scrotum is situated somewhat further forward than in the horse. It is 

 long, pendulous, and has a well-marked neck. The skin here is usuall}^ flesh-col- 

 ored, but in some breeds is more or less pigmented; it is sparsely covered with 

 short hairs. Just in front of it are four (sometimes only two) rudimentary teats. 



The testicles are relatively larger than those of the horse, and have an elon- 

 gated, oval outline. The long axis is vertical. The inner surface is somewhat 

 flattened. 



A testicle of an adult bull measures on the average about four or five inches (10 to 12 cm.) 

 in length, exclusive of the epididymis; with the latter the length is about six inches (15 cm.). The 



Vesicula seminalis 



Body of prostate 



External 

 urethral orifice 



Fig. 399. — -General View of Ge.\it.\l Org.^ns of Bull. 



width is about two and a half to three inches (ca. 6 to 8 cm.), and the antero-posterior diam- 

 eter about the same. The weight is about nine or ten ounces (ca. 250 to 300 grams). 



The tunica albuginea is thin. The parenchyma is yellowish in color. The 

 mediastinum testis descends from the anterior part of the upper extremity deeply 

 into the gland as an axial strand about 5 mm. in thickness. The vasa efferentia 

 leave at the upper end of the mediastinum. 



The epididymis is very closely attached to the testicle. The head is long; 

 it curves over the upper extremity and nearly half way down the anterior Ijorder 

 of the testicle. The body is very narrow, and lies along the outer part of the pos- 

 terior border of the testicle, to which it is attached by a narrow peritoneal fold. 

 The tail is large and is closely attached to the lower extremity of the testicle. 



The spermatic cord and the tunica vaginalis are much longer than in the horse; 

 the extra-inguinal part of the cordis about eight to ten inches (20 to 25 cm.) in length. 

 The cremaster externus is well developed, and almost completely incloses the tunic 

 to the neck of the scrotum; it does not extend so far down as in the horse, but is 

 inserted about at the level of the upper pole of the testicle. The vaginal ring is 



