1. L7: 7.2 “Modeling the Inside Surface of the Small Intestine”

2. QUESTION: What do the inside walls of the small intestines look like?

3. HYPOTHESIS: I believe the look like… because…

4. PROCEDURE: p. 52-53

5. DATA (2 slides) : 1. What would be the total surface area of the inside of the cylinder? 2. What is total surface area of the inside of the folded strip of tickets? 3. How much did your surface area increase?

6. DATA: Compare your model showing the fold in the walls of the small intestine to the cross-sectional view of the small intestines on p. 52 of your book.

7. VOCABULARY: 7.2 Villi 7.3 Colon 7.4 Large Intestine 7.5 Feces 7.6 Diarrhea 7.7 Constipation 7.8 Laxative 7.9 Rectum 7.10 Absorption

8. VOCABULARY: 7.2 Villi – finger-like projections in the small intestine that increase surface area 7.3 Colon – the large intestine 7.4 Large Intestine – holds feces and absorbs excess water 7.5 Feces – water, undigested food, mucus, dead cells, and bacteria

9. 7.6 Diarrhea – when feces moves through the colon too quickly and there is not enough time to eliminate excess water 7.7 Constipation – when feces moves through the colon too slowly and too much water is absorbed 7.8 Laxative – medication that increases the speed of peristalsis and feces movement speeds up 7.9 Rectum – end of the colon for feces collection 7.10 Absorption – the passing of fluid and nutrients from one side of a membrane to the other

10. CONCLUSION: Be sure to write complete sentences. Be sure look back at your original question. Be sure to use your vocabulary words.