VISCERAL ANATOMY. 157 



vessels and glands. The epithelium is ciliated and supplied by 

 the fifth nerve and its superior maxillary branch. 



Meatuses (three). 



Superior, above superior turbinated. 



Middle, between two turbinated. 



Inferior, below inferior turbinated. 



Blood Supply. 



Superior coronary, external nasal, palato-labial and ophthalmic 

 arteries. 



Taste. 



The mucous membrane of the tongue is the seat of this sense. 

 The tongue and the mucous membrane have been already de- 

 scribed. (See Mouth.} 



Nerve Supply. 



Posterior third by ninth nerve (glosso-pharyngeal). 



Anterior two-thirds by chorda tympani (from seventh). 



The nerves end in the taste (or gustative) bulbs, which are 

 found about the calciform and fungiform papillae. They are fusi- 

 form in shape, the upper extremity reaching the mucous mem- 

 brane. The nerve is found in the centre, and on the sides are 

 protective cells, fusiform in shape, each with a special nucleus. 



Auditory Apparatus. 



Divided into three parts, the external, middle and internal ears, 

 which collect, transmit and take cognizance of sound. The 

 internal ear, the essential part of the apparatus, being enclosed in 

 the petrous portion of the temporal bone. 



EXTERNAL EAR. 



This consists of the external auditory canal and the concha or 

 widened appendage. 



The Concha. 



This is pyramidal in shape, its apex directed forward and 

 upward, convex externally, concave internally. It consists of three 

 cartilages, ten muscles, a fatty cushion and integument. % 



Cartilages. 



(i) Conchal. Of the general shape of the whole concha, and 

 attached by the (2) Annular cartilage to the beginning of the 

 external auditory meatus. 



