OUR LUNGS 141 



QUESTIONS 



1. What happens to ribs and chest when you take a long breath? 



2. When do the lungs work? 



3. What do lungs look like? 



4. What is the name of the largest tube? 



5. What is it for? 



6. W r hat is at the end of each one of the smaller tubes? 



7. What gas does the blood bring to these cells? What gas does 

 it take away? 



8. What does lacing do to the lungs? 



9. What harm is it if the lungs do not get air enough? 

 10. What two things do the lungs do for us? 



