ARTERIA INNOMINATA. 



267 



Branches. The branches of the aorta, arranged in a tabular form, 



are- 



Ascending aorta 

 Arch of the aorta 



Thoracic aorta 



Abdominal aorta 



Coronary. 



Arteria innominate, I & Car K ot ; d '- 

 Left carotid, < Rl ht subclavian - 



Left subclavian. 



Pericardiac, 

 Bronchial, 

 \ CEsophageal, 

 Intercostal. 



Phrenic, 



( Gastric, 

 Coeliac axis, < Hepatic, 



( Splenic. 



Supra-renal, or capsular, 

 Renal, or emulgent, 

 Superior mesenteric, 

 Spermatic, 

 Inferior mesenteric, 

 Lumbar, 

 Sacra media, 

 Common iliacs. 



The coronary arteries arise from the aortic sinuses at the com- 

 mencement of the ascending aorta, immediately above the free 

 margin of the semilunar valves. The left, or anterior coronary passes 

 forwards, between the pulmonary artery and left appendix auriculae, 

 and divides into two branches ; one of which winds around the 

 base of the left ventricle, in the auriculo-ventricular groove, and 

 inosculates with the right coronary, forming an arterial circle around 

 the base of the heart, while the other passes along the line of union 

 of the two ventricles, upon the anterior aspect of the heart, to its 

 apex, where it anastomoses with the descending branch of the right 

 coronary. It supplies the left auricle and the adjoining sides of 

 both ventricles. 



The right, or posterior coronary passes forwards, between the root 

 of the pulmonary artery and the right auricle, and winds along the 

 auriculo-ventricular groove, to the posterior median furrow, where 

 it descends upon the posterior aspect of the heart to its apex, and 

 inosculates with the left coronary. It is distributed to the right 

 auricle and to the posterior surface of both ventricles, and sends a 

 large branch along the sharp margin of the right ventricle to the 

 apex of the heart. 



, ARTERIA INNOMINATA. 



The Arteria innominata (fig. 102, No. 4,) is the first artery given 

 off by the arch of the aorta. It is an inch and a half in length, 





