THE NASOPHAKYNX 



299 



longitudinal sinus a most significant fact. On the other hand the 

 veins of the respiratory region return their blood to the internal maxil- 

 lary vein, while some of those of the vestibule anastomose with the radi- 

 cals of the facial vein which supply the adjacent skin. 



FIG. 285. DIAGRAM OF THE RELATIONS OF THE NEURONS OF THE OLFACTORY NERVB 



AND OLFACTORY BULB. 



olf. c., olfactory nerve cells, located in the olfactory region of the nasal mucosa, 

 whose axons enter the olfactory nerve, olf. n., and terminate in relation with the 

 dendrites of the mitral cells, me., in the olfactory glomeruli, gl. The axons of the 

 mitral cells, a., enter the olfactory tract, where they make a sharp bend and pass 

 toward the cerebrum giving off frequent collaterals. At n' a nerve fiber appears 

 to end by a free ramification among the mitral cells of the olfactory bulb. (After 

 Schafer.) 



The lymphatics of the olfactory region can be readily injected from 

 the sub-dural spaces of the meninges. They form a network in the con- 

 nective tissue of the tunica propria. 



THE NASOPHARYNX 



This cavity, like that of the nose, is limited by a bony wall. Its 

 mucous membrane is continuous anteriorly with that of the respiratory 

 portion of the nose, and posteriorly with that of the oropharynx. The 



