338 



DETAILED SYNTHESIS. 



and to the upper surface of the diaphragm, all the 

 movements of these parts must be accompanied by a 

 conforming action of the lungs. 



990. Inf. IF THE WALLS OF THE CHEST AND THE DIAPHRAGM ARE 

 CAPACIOUS, and extensively movable, the lungs must be roomy, and 

 cause the action of a great quantity of air upon the Blood, and vice 

 versa. 



FIG. 222. 



Fio. 223. 



991. Illus. Fig. 222 represents a chest that is movable, and can 

 supply all the blood its body requires, while Fig. 223 represents a chest 

 that cannot supply the requisite air to the body to which it belongs ; and 

 all the inconveniences of a proper want of air must be experienced, in 

 ill health, imperfect complexion, deficient expression, and all the ills 

 that life is heir to. 



992. Remark. It is not necessary under this head to farther refer 

 to the walls of the trunk as respiratory organs. 



Digestory Organs. 



093. THE DIGESTORY ORGANS ARE CONSTRUCTED of 

 a digestory canal and its appendages. 



990. What ? 991. Describe Figs. 222, 223. Can the clothing be tight, and a 

 person not suffer? 998. How are ? 



