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1. what do the alveoli and blood capillaries have in common, and why?

2. what do the alveoli and blood capillaries have in common, and why?

3. What would happen to a freshwater fish that is placed in sea water?

4. What would happen to a freshwater fish that is placed in sea water?

5. What is contained in the air that we breathe in, and how does it difer to the air that we breathe out?

6. What is contained in the air that we breathe in, and how does it difer to the air that we breathe out?

7. in the bell-jar experiment what happens to the ballons when the rubber sheet is pulled downwards? What breathing process is this?

8. in the bell-jar experiment what happens to the ballons when the rubber sheet is pulled downwards? What breathing process is this?

9. If you are a diabetic, why must you inject insulin rather then take a tablet?

10. If you are a diabetic, why must you inject insulin rather then take a tablet?

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