CHAPTER X 

 THE RESPIRATORY APPARATUS 



THE respiratory apparatus consists of those organs 

 which receive and return the air breathed through 

 the nose, mouth, and pharynx, and convey it in a 

 system of closed tubes and cavities to the termination 

 of the lungs, where it comes in contact with the 

 capillaries of the blood, which permit, owing to their 

 thin walls and the lining membrane of the air cells of 

 the lungs a gaseous interchange between the carbon 

 dioxide and other waste materials of the blood and 

 the oxygen of the air breathed during the act of 

 respiration. 



THE ORGANS OF RESPIRATION 



In man the respiratory apparatus is described 

 under the following: Larynx, Trachea, Bronchi, and 

 Lungs. 



The organs of respiration are located as follows: 

 The larynx and beginning of the trachea in the neck, 

 the bronchi and lungs within the thorax. 



The Nasal Cavities. These are the proper channels 

 for the air to pass through. However, the mouth can 

 be used as desired by the individual, as is usually 

 employed by persons suffering from any nasal obstruc- 

 tion or a deficient amount of air reaching the lungs, 

 due to heart, lung, throat trouble, or changes in the 

 blood which compel forced or labored breathing 

 dyspnea. The air as it passes through the nasal 



