234 



PRACTICAL ANATOMY. 



THE AORTA. 



The aorta springs from the base of the left ventricle, 

 curves upward toward the right, then forms an arch the 

 convexity of which is superior ; it then passes down the 



20 



FIG. 105. THE AORTA. 



1, third cervical nerve ; 2, fourth cervical nerve : 3. pneumogastrie nerve : 4, fifth cer- 

 vical nerve ; 5, brachial plexus ; 6, phrenic nerve ; 7, lines of reflection of pericardium ; 



left side of the vertebral column through the aortic opening 

 in the diaphragm, and divides at the fourth lumbar ver- 

 tebra into the two common iliacs. The aorta is divided 



