RESPIRATION 91 



167. Adulterated tobacco. Some cigars, cigarettes, and 

 chewing tobacco have substances added to improve their 

 taste. For this purpose, molasses, licorice, vanilla, and 

 the like, are added. Some of these things do harm, and, 

 in any case, the addition of such substances is a fraud. 



SUMMARY 



1. The lungs are made of tiny sacs, upon whose side& 



capillaries are spread. 



2. By moving the chest walls, air is drawn into the lungs 



and forced out again. 



3. As the red blood cells shoot through the capillaries of 



the lungs, they take up tiny loads of oxygen from 

 the air. This makes the blood bright red in color. 



4. The blood carries oxygen to the capillaries of the body. 



There the oxygen goes to the cells of the body. 



5. The oxygen oxidizes the cells to carbonic acid gas and 



water. Thus the cells breathe. 



6. The blood carries the carbonic acid gas to the lungs, 



and gives it out to the air. 



7. When the cells have used all the air in the blood, we 



feel short of breath. 



8. We should breathe deeply and through the nose. We 



should sit and stand straight, and wear loose clothes, 

 to give our lungs room. 



9. In a case of drowning, you can make air enter and 



leave the lungs by pulling the arms above the head 

 and then pressing them against the chest. Do this 

 as often as you yourself breathe. 



10. Air passing between two cords in the larynx makes 



the sound of the voice. 



11. Alcohol takes oxygen from the cells of the body. 



12. Tobacco smoke irritates and poisons the lungs. 



