74 



HEALTH AND DISEASE 



something like the glans penis of the male. This is the "clitoris"; the 

 little body is partly contained within a prepuce formed by the coming 

 together of two short folds of mucous membrane corresponding with the 

 " labia minora". The integument covering the organ and lining its sheath 

 is richly supplied with glands of a sebaceous type, which form a substance 

 similar to the blackish gray secretion (smegma) commonly found in the 

 sheath of the male. The clitoris can be raised and its glans turned 



Fig. 228. View of the Genitourinary Organs of the Mare 



A, Rectum. B, Anus, c, Vulva. D, Vagina. K, Left Horn of Uterus. F, Ovary, c, Fallopian Tube. 

 H, Its Fimbriated extremity. I, Kidney. J, Ureter. K, Bladder. L, Pelvis. M, Mammary Gland. 



directly backwards. This action is well seen immediately after urination 

 and at frequent intervals during the period of osstrum. 



The cavity between the labia, into which the hand can be introduced, 

 is the " vulva "; it extends inwards for 4 or 5 inches, and is bounded 

 in front by the rudiment of the hymen, a small membranous fold which 

 separates it from the vagina. The vulva is lined by pink mucous mem- 

 brane, and kept moist by the secretion from numerous small mucous glands 

 embedded in its structure. Outside the mucous membrane there is much 

 loose connective tissue to allow of expansion of the passage during parturi- 

 tion, and large plexuses of veins. Outside this again are muscle fibres 



