RESPIRATION IN MAN 



RESPIRATORY MOVEMENTS OF THE ROOTS OP THE LUNGS 



The root of the lung has hitherto been regarded as the most 

 fixed part of the lung, the part from which the expansion of the 

 lung takes place. Were this so it is manifest that those parts of 



Verteb Col. 

 Apex 



Ank. Border (insp.) 

 Ant.Borderfe. 



Root (expiry- 

 Root finsp/'r.J 

 Peri card 



Lo *er Bore/, (ex p. 

 Lowar Bore/, (inspir.)- 

 Crus (inspir) 



Crus (expir) 



Flo. 1. Mediastinal aspect of the right lung to show the respiratory movement 

 of the root. The crus of the diaphragm is also indicated, and its attachment to the 

 root of the lung through the pericardium. The arrows indicate the direction of the 

 iuspiratory movement of the various parts of the lung. 



the lung which lie between the root and the stationary walls of 

 the thorax could undergo no expansion. The truth is that during 

 a complete inspiration the whole lung, root included, undergoes 



