CHAPTER XXIII 



SMELL 



THE organ of smell lies in the regio olfactoria of the nasal 

 mucous membrane (upper part of the septum nasi, upper 



FIG. 45. 



(After M. Schultze.) 

 A, epithelium of the mucous membranes 

 of the olfactory region; a a, olfactory cells; 

 b &, supporting cells; B, ciliated epithelial 

 cell from the regio olfactoria. 



-5 



FIG. 46. OLFACTORY CELL OF 

 MAN. (After v. Brunn.) 



I, cell-body with its nucleus; 2, 

 peripheral rod, with 3, its ex- 

 tremity, furnished with hairs, 4; 5, 

 central filament (beginning of an 

 olfactory fibre). 



meatus, upper part of the middle meatus). It is composed 

 of rods which lie between the epithelial cells. These rods 

 end externally in delicate hairs (Figs. 45 and 46) ; internally 



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