538 



BIOLOGICAL PHYSICS 



of mastication and insalivation, lending itself to the break- 

 ing up of the solid, and the disintegration of the insali- 

 vated, food, thus affording a basis of passive resistance, 



FIG. 132. PAPILLARY SURFACE OF THE TONGUE, WITH THE FAUCES AND 

 TONSILS. (From Sappey.) 



i, 2, circumvallate papillae ; in front of 2, the foramen caecum ; 3, fungiform papillae : 

 4, filiform and conical papillae ; 5, transverse and oblique ranges ; 6, mucous 

 glands at the base of the tongue and in the fauces ; 7, tonsils ; 8, part of the epi- 

 glottis ; g, median glosso epiglottic fold or fraenum epiglottidis. 



against which the tongue, by its serpentine muscular 

 powers, can successfully operate, making the intervening 

 alimentary pulp yield and attenuate until the required 

 degree of plasticity has been reached for it to be passed 



