TBE P08TEBI0B AOBTA. 535 



XJteko-ovaeian Artery. — The origin of this vessel is conformable with 

 that of the preceding artery. It is placed between the two laminae of the 

 broad ligament, and soon bifurcates into the ovarian and uterine arteries. The 

 ovarian branch describes numerous flexuosities, like the corresponding artery 

 in the male, and comports itself on the ovary in the same manner as the 

 latter vessel does on the tosticule. The uterine branch passes to the cornu 

 of the uterus, where its divisions anastomose with the proper uterine artery. 



7. Small Testicular Arteries : Male. Uterine Arteries : Female. 



Small Testicular Artery (Cremasteric Artery, Artery of the 

 Coed). — A pair, like the great testicular artery, this vessel is very slender, 

 and originates either from the aorta between the internal and external iliacs, 

 or from the latter, near its commencement. The last being the most 

 common, it is usual to describe it as a collateral branch of the crural (external 

 iliac) trunk. "We have regarded it as an artery emanating directly from 

 the posterior aorta, in order to include its description with that of the great 

 testicular and the utero-ovariaii arteries. 



Whatever may be its mode of origin, it gains the entrance to the vaginal 

 sheath, and enters it with the spermatic vessels, to be distributed to the 

 various parts constituting the cord. Before penetrating the substance of this 

 cord, it gives off several ramuscules destined for the peritoneum, iliac glands, 

 ureter, and deferent canal. 



Uterine Artery. — This has the same point of origin as the preceding, 

 its analogue, but differs from it in its larger volume., It is placed between 

 the two layers of the lumbar ligament, and is divided into two branches on 

 arriving at the small curvature of the uterine cornu : the anterior branch 

 anastomoses by its divisions with the utero-ovarian artery; the posterior 

 passes to the body of the matrix, where it communicates with the vagmal 

 artery. 



DOTEBENTIAL CHAEACTEKS OF THE POSTBEIOE AOKTA AND ITS OOLLATEBAL BEANCHES IN 



otbeb than soliped animals. 



1. Posterior Aorta in Ruminants. 



Thp artery pursues the same course as in Solipeds, and also terminates by four 



branches, towards the entrance to the pelvic cavity. tv„=,o „f +>,» Wnr«p in 



Parietal Bbanches.— The intercostal aHeries only differ from those of the Horse in 



thek number ; as but twelve are met with, of which eight or nine alone are furnished by 



*^^The toSrand diaphragmatic branches are absolutely identical, in their disposition, 



n^^^'^^t^W :tfis't?f ^^^^^^^ in volume, P-tieularly in the ^.p 



and Goa" TMs wUl be referred to hereafter (see interned time artery of Kuminants . 



Visceral BBANCHES.-i?ro«cAo-ce8oyfta3ea2 trmik.-TMs offers nothing particular. 



(Su^Lnh (Fig. 273, 1).-This artery descends on the rumen, a little behind the 

 insertion of the esophagus, is directed to the right, and divides near the omasum into 

 iwo te^nal branches-the superior and infeHor arteries of the omasum and abomasum. 



The collateral branches escaping from this trunk are : 



I- |ritS?rat::retcMvely destmed for the spleen (Fig^273, 8). 



I ?he suZiorartly of the rumen, always arising from a very short trunk common 

 * ■;• ^i^?hP Sding vessel, is carried backward to the superior face of the rumen and 

 from to desc^enffiween the two conical vesica to anastomose with the artery of the 



^^T'^^^enVTZiV^i^e^^ insinnaled between the two anterior 



1 ';, „l »^d afterwards runs along the inferior face of the organ, passing towards 

 '^'tSv^^S^^^^o conical vesica, tomeet the superior vessel fFig. 273. 3). 



