978 



THE ORGANS OF VOICE AND RESPIRATION. 



i.e., the most fixed part and thus, implicating the great vessels, is frequently fatal. It would 

 seem a priori a most unusual injury, and its exact mode of causation is difficult to interpret. 

 The probable explanation is that immediately before the compression is applied a deep inspira- 

 tion is taken and the lungs are fully inflated ; owing then to spasm of the glottis at the moment 



Recur, 

 lar. neri 



,-Iitf. thyroid art. 

 ,. ' Recur, lar. nerre 



<7^hw. }'. (I. ~ I/I/OK 



Epart. 

 Hchitx 



Great 

 coroit. i- 



Foramen for 

 (esophagus 



FIG. 539. Thoracic contents seen from behind. (Joessel.) 



of compression, the air is unable to escape from the lung, which is not able to recede, and con- 

 sequently gives way. 



Tn the second variety, when the wound in the lung is produced by the penetration of a 

 broken rib, both the pleura costalis and pulmonalis must necessarily be injured, and consequently 

 the air taken into the wounded air-cells may find its way through these wounds into the cellular 





