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In this activity (on pages 24-34), learners explore the four-part stomach of cows (and other grazing animals called ruminants), and compare it to the human one-part stomach and its digestive process.

In this activity that can be used as a lab or demonstration, learners use Lactaid® and lactose to demonstrate the concept of enzyme action.

In this activity, learners cut wells in JELL-O© and load the wells with different detergent solutions.

This simulation helps learners understand what happens to food as it passes through the digestive system.