Respiratory Function and Age 



59 



YOUNG 

 NORMAL 



EMPHYSEMA 



fI 



80 YtABS 



Fig. 1. The age (listribution of the sul)jects iuvestijiated. 

 this and subsetiuent similar tigures, the ordinate is the 

 centage of the total number of subjects studied. 



In 

 per- 



YOUNG 

 NORMAL 



NORMAL 



EMPHYSEMA 



40 



30 



%20 



lO 



40 

 30 



OLD o; 



/b20 



lO 



40 



30 



/^20 



MeAN«4>8 

 80^ 1-2 



NO. 35 



MEAN" 3-5 



%oi 1-2 



26 



40 ■ 



o 2 4 1 a 



"5 LITRES 



MEAN* I -9 



SO - 0-6 

 NO. 88 



"3 UTRES 



Pig. 2. The distribution of the Vital Capacity. 



