Topography. 



M. genio-glossus 



M. Ejemo-hyoideus 



331. Frontal Section of the Base of the Cranium and 



the Face immediately behind the posterior border of the Septum narium. 

 After H. v. L u s c h k a. 



The tonsils, Tonsillac, s. Amygdalae, which are conglomerates of 

 follicular glands, lie in the triangular space between the anterior and 

 posterior pillars of the soft palate. The space between the lower margin 

 of the palatine arches, the base of the tongue and between both tonsils, 

 leading from the mouth into the pharynx, is called isthmus of the 

 fauces, Isthmus faucium (see Fig. 330). 



The isthmus of the fauces changes in shape ; the muscles of the 

 soft palate contract and expand, elevate and depress it; with each act 

 of deglutition the soft palate is raised and made tense, the posterior pillars 

 of the fauces brought together, thus forming a narrow slit, which is entirely 

 closed by the uvula ; this prevents the passage of food towards the 

 upper part of the pharynx or the posterior nares. 



