CHAPTER XII 

 THE RESPIRATORY SYSTEM 



The respiratory system may be said to comprise a true respiratory 

 organ, the pulmonary alveoli, in which the interchange of gases between 

 the air and the blood occurs, and a system of duct-like passages leading 



Superior turbinate bone 



Olfactory nerve 

 Frontal sinus - I / Sup - 



Nasal sinus. 



Mid. turbinate 



Mid. meat 



Inf. turbinate 



Hypoglossal nerve 



Larynx 

 Thyroid cart. 



Sphenoidal sinus 

 Nasal nerve 



Auditory tube opening 



Anterior pillar 

 Tonsil 



Uvula 



Post, pillar of fauces 

 " * Pharynx 



Epiglottis 

 Ventricle 



Vocal cords 



Esophagus 



FIG. 280. PHOTOGRAPH OF Azoux MODEL, SHOWING NOSTRIL, PHARYNX, LARYNX 



AND RELATED STRUCTURES. 



292 



