266 



BIOLOGICAL PHYSICS 



the materials supplied to it by the selective instincts, and 

 prehensile organs of the individual, the initial work of 

 preparation, for gastric digestion and absorption, besides 

 the procedure of mastication and insalivation, however, we 

 feel bound to contend that a still further and most 



FIG. 112. MEDIAN SECTION OF THE MOUTH AND PHARYNX. (Sappey.) 



i to 8, relate to parts in connection with the nostrils ; 9, upper or respiratory part of 

 the pharynx; 10, aperture of the left Eustachian tube; IT, depression of the 

 mucous membrane ; 12, velum palati ; 13, 13, vestibulum oris ; 14, arch of the 

 palate ; 15, space at the back of the dental series ; 16, 17, tongue ; 18, genio- 

 glossus ; 19, genio-hyoid ; 20, mylo-hyoid, cut; 21, 22, anterior and posterior 

 pillars of the fauces ; 23, tonsil ; 24, posterior vertical part of the tongue ; 25. its 

 glandular eminences and depressions ; 26, 27, lower part of the pharynx ; 28 to 37, 

 refer to parts of the larynx ; 30, epiglottis. 



important, chemico-physiological, process, has to be gone 

 through, synchronously with these, by the alimentary 

 materials, the outcome of which, it is still premature to 

 attempt to estimate, or appraise, but the apparent influence 

 of which proportioned to its extent, and incidence- 

 must be reckoned, as of very great extent and functional 



