THE ARTERIES 



751 



the left part of the stomach, giving off a branch which anastomoses with the right 

 gastric artery. The splenic artery gives off pancreatic branches, and reaches the 

 ventral part of the spleen. It gives off the left gastro-epiploic and a gastro- 

 splenic branch which passes to the dorsal end of the spleen, which it supplies, 

 besides giving off twigs to the left extremity of the stomach. 



The anterior mesenteric artery arises close behind the coeliac. It gives off a 

 common trunk for two colic arteries and the ileo-caeco-colic. The right colic 

 artery is a small vessel which goes to the right part of the colon. The middle 

 colic artery is much the largest of the colic vessels; it supplies the transverse colon 

 and part of the right colon. The ileo-cseco-colic gives off ileal, caecal, and colic 

 branches. Anastomoses are established between the colic arteries, and the ileal 

 branch anastomoses with the last jejunal artery. The trunk is continued as the 



Fig. 620. — End Branches op Aorta and Radicles of Posterior Vena Cava op Dog. 

 a, Abdominal aorta; &, poaterior mesenteric artery; c, lumbar arteries; (/, circumflex iliac artery; e, external iliac 

 artery; /, deep femoral artery; ff, posterior abdominal artery: A, external pudic artery; a, femoral artery; i, j, internal 

 iliac arteries; k, visceral branch of i; I, parietal branch of i; m, ilio-lumbar artery; n, anterior gluteal artery; o, lateral 

 coccygeal artery; jt, posterior gluteal artery; g, umbihcal artery ; r, middle hsemorrhoidal artery; ^, posterior hEemor- 

 rhoidal artery^; s, perineal artery; t, art. profunda penis; n, art. bulbi urethrae; v, art. dorsalis penis; w, middle sacral 

 artery; a' , posterior vena cava; other veins are satellites of arteries and correspondingly named; i, ilio-psoas muscle; 

 .S, tendon of psoas minor; 3, abdominal muscles; .^, sartorius; -5, rectus femoris; 5', vastus medialis; ^, pectineus; 6', 

 adductor; 7, graciUs; 8, symphysis pelvis; 9, ilium; 10, piriformis; 11, gluteus superficialis; 12, obturator internus; 

 13, penis; 14, lumbar vertebras. (After EUenberger, in Leisering's Atlas.) 



artery (?f the small intestine, giving off fourteen to sixteen branches (Aa. jejunales), 

 which form a series of anastomotic arches in the mesentery near the bowel. 



Two phrenico-abdominal arteries (Aa. phrenicee caudales) come off from the 

 aorta behind the anterior mesenteric, and divide into phrenic and abdominal 

 branches. Each phrenic artery diverges from its fellow in descending on the ab- 

 dominal surface of the corresponding crus of the diaphragm to the sternal part. 

 The medial branches anastomose with those of the opposite artery, the lateral 

 branches with intercostal arteries chiefly. The abdominal arteries pass outward 

 across the psoas muscles, give branches to the lumbar muscles, the renal fat and 

 adrenals, and ramify in the oblique abdominal muscles. 



The renal and spermatic arteries offer no special features. 



The utero-ovarian artery divides near the ovary into three or four branches 



