THE ARTERIES. 



109 



The posterior divides 



branches of the internal mammary and axillary. 



into a spinal branch going to 



the vertebrae and the spinal FlG - s8 ' 



cord, and a muscular to the 



muscles of the back. 



Describe the Abdominal 

 Aorta. It begins where the 

 thoracic ends, and terminates at 

 the 4th lumbar vertebra in the 

 common iliacs. Its branches are 

 as follows : 



CCELIAC Axis, 2 arises oppo- 

 site the margin of the dia- 

 phragm, runs forwards for 

 half an inch and divides 

 into the Gastric, Hepatic, 

 and Splenic arteries, occa- 

 sionally giving off one of 

 the phrenics. 



Gastric? supplies the stomach 

 along its lesser curvature, 

 anastomosing with the aortic, 

 cesophageal, splenic, and he- 

 patic branches. 



Hepatic , 4 divides in the trans- 

 verse fissure of the liver into 

 the right and left branches, 

 to the lobes of that organ ; 

 also the 

 Pyloric. 

 Cystic. 



Splenic? the largest branch of the coeliac axis, passes by a very tortuous 

 course to the spleen, giving off the following: 

 Pancreaticae Parvse. Gastric (vasa brevia). 



Pancreatica Magna. Gastro-epiploica Sinistra. 



Phrenic^ one on each side, but usually only one arises from the aorta, the 

 other springing from either the coeliac axis or the renal artery. They go 

 to the under surface of the diaphragm. 



Superior Mesenteric? supplies the small intestine, csecum, ascending and 

 10 



Gastro-duodenalis/ Gastro-epiploica Dextra 

 I Pancreatico-duodenalis. 



