Mrs. Bergevin’s Science Lab

K-3 Lesson

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Video 4-6 Lesson

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Digestive System Experiments

See Amylase In Action

Amylase is a digestive enzyme found in saliva that breaks down starches. We did a simple digestive system experiment to let the kids actually see and experience the way amylase works.

1. Put a small piece of saltine on the tongue.

2. Within seconds you should start to feel the cracker start to dissolve. That is the amylase breaking down the starch in the cracker.

3. Place a small piece of cheese on the tongue.

4. After 2o seconds remove the cheese and look at it. Besides being wet, there should be no change. There is no starch in cheese so the amylase had nothing to break down.

Digestive Experiment

Create A Stomach

This is a great project to re-create the churning and breaking down of food that takes place in the stomach.

1. Place a piece of bread and 2-3 tbsp of water in a Ziploc bag.

2. Squeeze the bag with the hands simulating the action of the stomach-churning food.

3. Notice how the water and churning turn the piece of bread into an almost liquid form. This is similar to the chyme that is released by the stomach into the small intestine.