TtlE l'sn:i;li: AORTA. 535 



UTERO-OVARIAN ARTERY. The origin of this vessel is conformable with 

 tliftt 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 

 vnirian branch describes numerous flexuositics, like the corresponding artery 

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

 Litter vessel does on the testicule. 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-ovarian 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. 



UTEBINE 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 vaginal 

 artery. 



IHKKKRENTIAL CHARACTERS OF THE POSTERIOR AORTA AND ITS COLLATERAL BRANCHES IN 

 OTHER THAN SOI-U'Eli ANIMALS. 



1. Posterior Aorta in Ruminant*. 



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



towards tin- eiitiain-t- t-> \\K- p. Ivie -avity. 



, in.-. Tin: inii nwtul arteries only differ fmni those of the Horse in 

 their number ; as hut twelve are met with, of which i i^'ht or niuu alone are furnished by 

 tin- | J'ta. 



Tin- Innilxir ami ili'iphragmatic branches arc absolutely identical, in their disposition, 

 with th analogous arteries of SolijM-dB. 



Th.- mi'l'll- laonl artn it man con.-ideiaUe in volume, particularly in th.- >'/<-</- 

 and (iixtt. Thin will lie referred t<> hen-alter (-'< inl>rnnl Him- nrt,nj of JiuniinanU). 

 \ l!i:AM-iti B. Broneho-cuophageal trunk. Thin oilers nothing particular. 



- in- trunk (Fig. Tt'\ \ .. This arli-ry de-e nd- <m tin- rumen, u lntl<- hrhinil the 

 bn of the oaeophagrns, IB direct d t" the right, Mid divides mar tin- omasum into 

 i mi mil branches the cupertW and // /-/<., the omawm and abomannni. 



illati-ial hr.tn<-hi.s escaping from thus trunk are: 



: i',ililir"ijm 'tl<- nrl> ri- -\ 

 2. Tin- f/il'iii-- artery, :ilni"st i-\rlii>;\. ly diiiM-d \ r the bpl.fii (l-'i- -J73, 8). 



./ <trt>nj f tin rnini a. always aiininjj frdii a very short trunk ooinnmn 



tn it : ml tli.- preceding vessel, is carried backward tn th<. .Hii|-rii.r i: ; tin- rum. n. :md 



tr .in tliis !. - iids l>etweeii the two conical veaicao to auastomoau with the artery of the 



us (!'!_'. -JT::, -J). 

 4. Th i-lirijiif tin I-IIIIK a. \\hich is in-iunated In t\v. en the two n 



. and afterwards runs almi-; the inferior i'a.'e of tin i-ri;an. pas>iiiL' t"\\;ud 3 

 the n ,trh cepara'in^ the two conical \ DM et tin- Miju-riur Vissel 'Fig. iJ73, :?). 



