1574 



HUMAN ANATOMY. 



easily recognized, as just before it is a V-shaped arrangement of circumvallate papillae, 

 the median apex being at or near a small depression, the foramen cczcuni, which 

 marks the termination of the foetal duct through the tongue from the thyroid. In 

 the adult this may be a short tunnel or a depression, into which the ducts of several 

 glands open. According to MUnch,^ it is always behind the hindmost circumvallate 



Fig. 1334. 



Cut zygoma 



Pterygoid 



plates 

 Eustachian 

 tube 



Cut and reflected ^ , 

 soft palate v- - / 



Internal pterygoid 

 muscle 



Section of mandible. 



Half of uvula 

 Anterior pillar of fauces 



Posterior pillar of fauces 



Lymph-nodules constituting, 

 lingual tonsil 



Sphenoidal 

 sinus 



Spine of 

 sphenoid 

 Zygoma 



Fossa of 

 Rosenmiiller 



Eustachian 

 tube 



Posterior wall of 

 pharynx 



cut and turned 



vula 



Faucial tonsil 

 Epiglottis 



Foramen caecum 



Circumvallate 

 papillas 



./ 



/interior portion of head has been removed by frontal section passing through plane of posterior nares ; the soft palate 

 cut in mid-line and turned aside, exposing posterior wall of pharynx ; tongue drawn forward and downward. 



papilla. The mucous membrane covering the dorsum of the tongue is closely beset 

 with elevations, ox papUlcs, of which there are three varieties, the filiform, fungiform, 

 and circumvallate. In general they consist of a core of connective-tissue stroma cov- 

 ered with stratified squamous epithelium ; the projection formed by the connective 

 tissue bears minute secondary papillae, which, however, do not model the free sur- 



' Morpholog Arbeiten, Bd. vi., 1896. 



