I06 ANATOMY OF THE RABBIT 



the diaphragm to the caudal end of the aorta. The last one, 

 which arises from the aorta just above its bifurcation to form 

 the common iliacs"(52), is the middle sacral which passes along 

 the ventral side of the caudal vertebrae. 



47. Superior mesenteric a.: Aorta; to small intestine, 

 cecum and colon, except last 15-25 cm., which region is supplied 

 by the inferior mesenteric (51); largest of the branches of the 

 abdominal aorta; anastomoses freely. Nearly half the blood it 

 carries flows to the large, and the other half to the small intes- 

 tines (Fig. 28 LI, S). 



48. Renal a.: Aorta; to kidney. Anomalies of origin are 

 common to these arteries. The right commonly emerges 

 craniad to the left, and both often bifurcate before entering the 

 kidney. 



49. Adrenolumbalis a.: Renal, aorta, or rarely phrenic 

 arteries; to adrenal (supra-renal) glands and abdominal wall 

 and fat craniad to the kidneys; often anastomoses with branches 

 of the iliolumbars (53). 



50. Genital a.: Aorta, most any place between the renals 

 and inferior mesenteric; to ovaries (ovarian, utero-ovarian 

 artery) or to testes (internal spermatic arteries). 



51. Inferior mesenteric a.: Aorta; chiefly to the last six 

 inches of the colon. Throughout most of its length it parallels 

 the inferior mesenteric branch of the hepatic portal vein. 



52. Common iliac a.: Aorta; by branches to inferior limb 

 (external iliac a.), abdominal wall (epigastric a.), pelvis and 

 pelvic viscera (internal iliac or hypogastric, and median sacral 

 aa.), urinary bladder and uterus (cystic a.), testes or labia 

 (internal pudic a.) and other parts. The bifurcation of the 

 abdominal aorta forms the common iliacs and marks the 

 caudal end of the aorta. 



53. Iliolumbar a.: Common iliacs, or aorta; to lateral 

 abdominal walls; often anastomosing with adrenolumbalis a. 

 (49). Occasionally there will be a pair from the aorta in 

 addition to the normal pair. 



