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HUMAN PHYSIOLOGY 



FIG. 43. Relations of the mouth and nose. This is a vertical sec- 

 tion through one nostril, and therefore slightly away from the mid-plane 

 of the head. The convoluted character of the lateral wall of the nasal 

 cavity is suggested. The connection between the nose and the throat 

 will be seen behind the soft palate (P) ; L is placed in the larynx, above 

 which is shown the spur of the epiglottis; indicates the course of the 

 esophagus. It will be noted that the course taken by the food crosses 

 the route of the breathing in the pharynx. 



