608 



GENITAL ORGANS OF THE COW 



about an inch (ca. 3 cm.) long, and readily admits the end of a finger. ^ The two 

 glandulae vestibulares majores- are situated in the lateral walls of the vulva, under 

 the constrictor vulvae. They are little over an inch (ca. 3 cm.) long and about half 

 an inch (ca. 1.5 cm.) in width. Each has two or three ducts which open into a 

 small pouch of the mucous membrane; this cul-de-sac opens on the floor of the 

 vulva, about an inch and a half (ca. 3^ cm.) lateral to and behind the external 



Fig. 539.- 

 a, Body of gland; b, lactiferous sinus; 



—Cross-section of Mammary Glands of Cow. 



:, cavity of teat; d, lactiferous duct; e, intermammary groove; /, septum be- 

 tween glands; g, supramammary fat. 



urethral orifice. The gland consists of lobules separated by relatively thick trabec- 

 ule of connective tissue and unstriped muscle. The glandulae vestibulares 

 minores occur along the median ventral groove. Numerous lymph nodules are 

 present in the mucous membrane, especially in the ventral part; they may be 

 large enough to cause visible prominences. 



The clitoris has very short crura, but the body is four or five inches (ca. 10-12 



1 The form and position of this pouch should be carefully noted on account of the difficulty 

 it causes in catheterizing the bladder. If the catheter is passed along the ventral wall of the 

 vulva (as in the mare), it will always enter the pouch instead of the urethra. 



^ Also known as the glands of Bartholin. 



