230 



ELEMENTARY PHYSIOLOGY 



while the lateral margins are continuous with tlie sides, 

 and the lower with the tloor, of the mouth. The narrow 



Fic. 60. -A Section of tiik Mouth and Nose taken vertically, a 



LITTLE TO THE LEFT OF THE MlDDl.E LiNE. 



a, the vertebral, column ; b, the oesophagus or giiUet ; c, the wind-pipe ; 

 rf, the thyroid cartilage of the larynx ; e, the epiglottis ; .(', the tivula ; rf, 

 the opening of the left Eustachian tube ; /(, the opening of the left 

 lachrymal duct ; (, the hyoid bone ; k; the tongue ; /. the hard palate ; 

 m, 71, the base of the skull ; o, p, q, the superior, middle, and inferior 

 turbiual bones. The letters g, j, e, are placed in the pharynx. 



end of the pharyngeal bag passes into the gullet or 

 oesophagus (/>), a nmscular tube, which affords a passage 

 into the stomach. 



