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What Do You Know About the Digestive System?

What happens to that cheeseburger and fries (or, we hope, that whole wheat bread and green salad) you had for lunch? During the digestive process, food is converted into energy that's used by your body. Take this quiz to see how much you know about how digestion works.

1. How does food move through your digestive tract?
2. Where does most of the digestive process take place?
3. What does the liver do to help digestion?
4. Which of these can harm the intestinal lining?
5. Which of these best maintains intestinal health?
6. Which of these can cause heartburn?
7. Which of these causes ulcers?
8. Food poisoning is caused by eating contaminated food. How can it be prevented?
9. How does age affect digestion?