184 



Pulmo 

 dexter 



Arteria pulmonalis. 



V.dextra, Pulmo 

 r f, sin. 



vpulmon. 



520. Pulmonary Artery and Air Passages of a Child 



J / 2 natural size, after a specimen of Hyrtl. 



The pulmonary artery, Arteria pulmonalis, arises from the 

 right ventricle; at the concavity of the aortic arch it divides into a 

 right and a left branch. The right, longer branch passes behind the 

 ascending aorta and superior Vena cava to the root of the right lung. 

 The left, smaller branch passes in front of the descending aorta and 

 left bronchus to the root of the left lung; it is connected with the 

 concave portion of the aortic arch by means of a short, fibrous cord, 

 which corresponds to the obsolete Ductus arteriosus Botalli of the embryo. 



In the root of the lung, the right and left pulmonary arteries, 

 both lie in front of the bronchus and behind the veins. On the right 

 side the bronchus is highest and the veins lowest, while on the left 

 side the bronchus sinks to a level between the artery and veins. 



