1 68 



VOICE. 



12. The Air-Passages are the nostril-chambers, the phar- 

 ynx, the larynx, the windpipe 

 or trachea, the bronchi, and 

 the bronchial tubes. The nos- 

 trils (Fig. 42) open behind, 

 into the upper part of the 

 pharynx. From the front of 

 the pharynx, below the level 

 of the root of the tongue, 

 "L k, and above the opening into 

 the gullet, the larynx pro- 

 ceeds. Its opening is over- 

 hung by a sort of lid, e, 

 named the epiglottis. This lid 

 shuts down when food or 

 drink is passing through the 

 pharynx, but stands up at 

 other times. 



13. The Larynx is the or- 

 gan in which voice is pro- 

 KIG. 42. The mouth, nose, and duced. The hard projection 



pharynx, with the commencement of 



the gullet and larynx, as exposed by J n front of the neck, COm- 



a section, a little to the left of the mid- 



dle of the head. , vertebral column; 



b, gullet; c, windpipe; <r, epjgl< 



./", soft palate; g, opening of Eusta- 



in3pK;T%>teiota; m nl y " amed " Adam ' S a P~ 

 chian tube; *, tongue; /, h a ?d palate^ P le >" is Caused by the larynx, 



c a 

 IS a 



*, the sphenoid bone on the base of 

 the skull; , the fore part of the skull- 

 cavity; 0, /, $r, the turbinate bones of / 7 *-* \ T A u 

 the outer side of the left nostril-cham- (a, fc Ig. 42) lined by mu- 



cous membrane. At one 



place the mucous membrane is pushed in from each side, 

 so that only a narrow slit is left in the middle. This 



12. Name the air-passages ? Into what do the nostrils open be- 

 hind ? Where does the larynx begin? What is the epiglottis? Its use? 



13. Name the organ of voice ? What is the larynx ? W T hat is the 

 glottis ? What are the vocal cords ? 



