1. The Digestive System

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5. The Digestive System Video

6. Why is digestion important?
Digestion is the breakdown of big bits of food into small nutrients that can get into our blood.

7. Visking tubing acts like the intestine wall.
Model Gut Experiment
Visking tubing acts like the intestine wall.
Inside Intestine
Blood
Tubing: 10 ml Starch
Beaker: Water + Iodine

8. Visking tubing acts like the intestine wall.
Model Gut Experiment
Visking tubing acts like the intestine wall.
Tubing: 10 ml Starch
Beaker: Water + Iodine

9. Inside Tubing / Intestine
Starch
Outside Tubing / Blood
Water + Iodine

10. Starch is too big to move into blood
Inside Tubing / Intestine
Starch
Outside Tubing / Blood
Water + Iodine
Starch is too big to move into blood