82 THE POCKET ANATOMY 



and body of vertebra, and backwards, muscular branch which 

 divides into inner and outer branches to muscles of back. 



(The ist and 2nd intercostal arteries come from the sub- 

 clavian trunk, vide p. 64). 



ABDOMINAL AORTA. 



Extent. From last dorsal vertebra to the left side of body 

 of 4th lumbar vertebra, there dividing into common iliacs. 



Course and Relations. Enters abdomen between pillars of 

 diaphragm, occupying middle line of spine, but near its bifur- 

 cations inclines to left side. 



In front, from above down. Small omentum, stomach, solar 

 plexus, pancreas, splenic vein, left renal vein, 3rd part of 

 duodenum, root of mesentery, coils of small intestine, aortic 

 plexus and peritoneum. It touches the pancreas and duodenum 

 without any intervening peritoneum. 



Behind. Bodies of upper 4 lumbar vertebrae, left lumbar 

 veins, receptaculum chyli and thoracic duct. Embraced by 

 crura of diaphragm above. 



On right side. Vena cava inferior, thoracic duct, vena azygos 

 major, and right semilunar ganglion. 



On left side. Left sernilunar ganglion, and left cord of 

 sympathetic. 



Branches : 



Inferior phrenic (2): arising close together immediately 

 below diaphragm, pass on its under surface across crura, the 

 left one passing behind oesophagus, the right one behind 

 inferior vena cava. 



Branches : 



Internal : to fore-part of diaphragm ; anas, fellow, and 

 superior and musculo-phrenic of internal mammary. 



External : to outer side of muscle ; anas, musculo-phrenic, 

 lower intercostals. 



Superior capsular : to supra-renal body. 



Cceliac axis : arises between pillars of diaphragm, just 

 above pancreas, i ncn I n g 5 surrounded by solar plexus ; 

 divides into three visceral branches. 



Branches : 



CORONARY OF STOMACH : smallest of three branches, directed 

 upwards and to left side behind lesser sac of peritoneum to car- 

 diac end of stomach ; gives off a few cesophageal branches, then 

 turns to right along lesser curvature, giving branches on each 

 side to viscus, finally anastomoses with pyloric of hepatic. 



HEPATIC : directed (to right) forwards and upwards between, 

 layers of small omentum, and anterior to foramen of Winslow,. 



