Fun Facts:

1. The small intestine is a long tube about 22 feet long.

2. Muscles contract and relax in the esophagus to push food down to the stomach. Your food does not need gravity to get to your stomach so you can digest food when you are up-side-down!

3. The average human produces 1 to 3 liters of saliva each day.

4. Over 90% of your digestion occurs in your small intestine.

5. Food is cooled or warmed in the mouth until it is a good temperature for the body