THE ALIMENTARY CANAL AND ITS APPENDAGES 447 



tary mucous membrane is in close physiological relationship; and 

 anything disordering the stomach is likely to produce a " furred 

 tongue." 



The Salivary Glands. The saliva, which is poured into the 

 mouth and which, mixed with the secretion of minute glands em- 



FIG. 127. The upper surface of the tongue with part of the pillars of the fauces 

 and the tonsils. 1, 2, circumvallate papillae; 3, fungiform papillae; 4, filiform pa- 

 pillae; 6, mucous glands; 7, tonsils; 8, tip of epiglottis. 



bedded in its lining membrane, moistens it, is secreted by three 

 pairs of glands, the parotid, the submaxillary, and the sublingual. 

 The parotid glands lie in front of the ear behind the ramus of the 

 lower jaw; each sends its secretion into the mouth by a tube known 



