44 



OBSTETRICAL ANATOMY. 



a few smooth longitudinal rugae, and the os uteri is a smooth, thick, and 

 even prominence, larger almost than the body of the uterus, which is 

 short. It projects very markedly into the vagina. The utricular glands 

 are pyriform ; the round ligaments escape from the abdomen by the in- 

 guinal rings. 



Development. 



In the foetus and the adult animal which has not been fecundated, the 

 uterus is comparatively small, narrow, and insignificant ; but it increases 



Fig. 19. 



Uterus, Oviducts, and Ovaria of the Sheep. 



, Vagina ; b, Os Uteri ; c, Transverse Folds of Cervix Uteri ; d. Body of Uterus ; e e, 

 Caruncles or Cotyledonal Processes ; _/, Confluence of the Cornua ; ^, Intact Comu f 

 k /t, Oviducts or Fallopian Tubes; z /, Fimbriae; k k. Ovaries; /, Round Ligament; 

 m m, Broad Ligaments ; n n, Cotyledons. 



in volume with age after the venereal desires become manifest. In a calf 

 a little more than a month old, the total length from the vulva to the ex- 

 tremity of the cornua was about ten inches, of which the vagina formed 

 about five-eighths. In the lamb the uterus and vagina only measure about 

 six inches in length. From this period until the animal is capable of 

 breeding, the uterus receives so little blood that it may be removed with- 

 out much risk. 



During gestation the uterus acquires a great volume, and its cavity, 

 usually less than that of the vagina, is considerably increased, its shape 

 then bearing some resemblance to one of the large intestines. The cor- 

 nua vary in size, according to the dimensions and species of the different 

 animals. In those which are uniparous (one foetusj, as the Mare and 



