2i 4 THE POCKET ANATOMY 



Relations of the right root : 



In Front. Behind. Atm*. Below. 



Right phrenic Right pneumogas- Vena azygos Ligament -.im 



nerve. trie nerve. major. latum pu : . 



Superior vena cava. Vena azygos major. m o n i s. 

 Part of right 



auricle. 



Relations of the left root : 



In Front. Behind. Above. Below. 



Left phrenic nerve. Descending thoracic Arch of Ligamenturr 



aorta. aoita, latum pul- 



CEsophagus. munis. 

 Thoracic duct. 

 Left pneumogastric 



Position of the constituents of the root : 

 From before backwards in each lung : 

 Pulmonary veins. 

 Pulmonary artery. 

 Bronchus. 



From above downwards : - 



Right side. Left side. 



Bronchus. Pulmonary artery. 



Pulmonary artery. Bronchus. 



Pulmonary veins. Pulmonary veins. 



THE PULMONARY ARTERY. 



The pulmonary artery conveys venous blood from the right 

 side of the heart to the lungs. It is 2 inches long, and com- 

 mencing at the infundibulum of the right ventricle, is directed 

 upwards in front of ascending part of aorta, and in same tube 

 of pericardium, then passes upwards and backwards on left 

 of ascending aorta to reach the concavity of the aortic arch, 

 where it divides into right and left branches for the lungs. 

 Near the bifurcation a fibrous cord, the ligamentwn arteriosum, 

 passes from the left branch to the under surface of the aorta. 

 It is the remains of the ductus arteriosus in the foetus. 



Relations (contained in same sheath of pericardium with 

 ascending aorta) : 



