Our 2-4th graders did a fun biology experiment today. They modeled the digestive system with some bread, toilet paper tube, water, towel & a bowl.
You chew up the bread into small pieces in your mouth and the bread travels down to the stomach (bowl) through the esophagus (toilet paper tube).
In your mouth you add liquid in the form of saliva or water that you drink.
Your Stomach provides bile (orange liquid) to clean the germs off the food. The stomach also mixes the food together.
The stomach then empties into the Small intestine (towel) which absorbs the liquid.
After some liquid is absorbed, it moves into the large intestine where even more liquid is squeezed out.
The part that is left is what exits the body – poop!
What a fantastic way to illustrate and model the digestive system!
The Greenhouse 