98 Physiology. 



anything stuck in the throat, and it may be necessary to 

 hold a child with the head downward. There are various 



- 



COMPLEMENT AL AIR. 



120 CUBIC INCHES. 

 AIR THAT CAN BE BUT SELDOM IS TAKEN IN. 



TIDAL AIR. 20 to 30 Cubic Inches Air Taken in 

 and Sent out at Each Breath. 



RESERVE AIR. 



100 CUBIC INCHES. 

 AIR THAT CAN BE BUT IS SELDOM DRIVEN OUT. 



RESIDUAL AIR. 



100 CUBIC INCHES. 

 AIR THAT CANNOT BE DRIVEN OUT. 



Fig. 59. Diagram of Lung Capacity. 



* 



\- CL ^i 



qj C\j 



1 



"^ 



other peculiar forms of respiration, such as yawning, sniff- 

 ing, laughing, etc., which you can explain after watching 

 and thinking about them. 



