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Y8 Science Digestive System

Digestive System
1. What is digestion?
2. Is the following sentence true or false? In chemical digestion, foods are physically broken
down into smaller pieces by chewing. Explain your answer
3. The process by which nutrient molecules pass through the wall of the digestive system
and into the blood is called___________
4. What happen to materials that are not absorbed? Explain your answer.
5. The fluid released when your mouth waters is called_____________.
6. What occurs during chemical digestion in the mouth?
7. Give two reason why hydrochloric acid in the digestive juice does not damage the
8. A flap of tissue that seals off the windpipe, preventing food from entering it____________
9. Involuntary waves of muscle contraction that push food through the digestive
10. What is the role of gall bladder?
11. The tiny finger-shaped structures that cover the inner surface of the small intestine are
12. What happen to the water contained in the materials that pass into the large intestine?