122 ELEMENTARY PHYSIOLOGY. 



successfully carried on in such a lung as is here 

 represented ? 



Here in the lower right-hand corner of this plate 

 we have a view of what is left of the lung after years 

 of cigarette smoking. Nicotine has filled every air- 

 cell. Nicotine had caused his death. 



In the opposite lower corner on the Aid is seen 

 a view of what is called smoker's cancer. It usually 

 occurs in the throat and often proves fatal. 



We have now briefly considered the 

 essential features in the structure of 

 the human body and the principal functions of the 

 various organs. What is beneficial, as well as what 

 is harmful, in its effects, has received attention. 

 With the assistance of the Anatomical Aid, we have 

 endeavored to impress the mind with some of the 

 effects of alcohol and tobacco. If now, by the use 

 of this little book in connection with the Aid, our 

 young people may be induced to study the wonder- 

 ful mechanism of their bodies, and try to avoid that 

 which is injurious or in any way interferes with 

 their physical or mental well-being, we shall have 

 accomplished our purpose. 



