THE RESPIRATORY SYSTEM. 



387 



Ml 



J'o E " s 



S il " a 



So g g.g 



la 5 a -" 

 •a o .S • t< 



11 = 11 



gOo g B 



•=-c a i~ 



I lias 



53'-' '."_r 



S-Sgsfe 



-, to Sea 



H3 o PO-S 



I -Soil I 



ar-l 5*; ©."S 



ft" '-^ s^ 



^Qj *- — 'tis ffi 

 I ^ p,Q) oDv 



