750 CIRCULATORY SYSTEM OF THE DOG 
The thoracic aorta supplies the last nine or ten pairs of intercostal arteries, 
but no anterior phrenic arteries. It gives off two or more cesophageal branches, in 
addition to the broncho-cesophageal, which arises close to or with the sixth inter- 
costal and ramifies in the usual manner. 
The abdominal aorta, after giving off the external iliac arteries, continues 
about half an inch to an inch (ca. 1-3 em.) under the last lumbar vertebra, gives 
off the internal iliac arteries, and is continued by the middle sacral artery (Fig. 
624). This small vessel runs backward under the sacrum and coecygeal vertebre 
and gives off branches in segmental fashion. Six pairs of lumbar arteries are given 
off from the aorta, the seventh coming from the internal iliac artery. 
Fic. 619.—Artertes oF Distat Part or Ricut Fore 
Fic. 618.—Anrrteries oF Distat Part or Ricut Fore 
Lims oF Doc; Vouar VIEW. 
Limos oF Doc, Dorsat View. 
7, Radial artery; j, ulnar artery; k, volar inter- 
osseous artery; 1, deep volar arch; m, fifth volar meta- 
carpal artery; n, deep volar metacarpal arteries; p, super- 
ficial volar metacarpal arteries; 0, g, common digital 
a, Branch of volar interosseous artery; 6, proximal 
collateral radial artery (lateral branch); c, radial artery 
(dorsal branch); d, rete carpi dorsale; e, deep dorsal 
metacarpal arteries; f, superficial dorsal metacarpal 
arteries; g, common digital arteries; h, proper digital arteries; r, proper digital arteries. 
arteries. 
The ceeliac artery gives off the hepatic artery and forms a short trunk from 
which the gastric and splenic arteries arise. The hepatic artery, after giving off 
several proper hepatic arteries, and the right gastric artery, which passes along the 
lesser curvature of the stomach and anastomoses with the left gastric artery, is con- 
tinued by the gastro-duodenal artery. This divides near the pylorus into right 
gastro-epiploic and pancreatico-duodenal arteries; the former supplies branches 
to the pylorie part of the stomach and passes along the greater curvature of that 
viscus in the omentum and anastomoses with the left gastro-epiploic. The left 
gastric artery passes to the lesser curvature of the stomach and ramifies chiefly on 
