In our science lessons this term we are looking at the human body and how it works. To help us understand what happens to food when we eat it, we made some model stomachs from plastic bags.
First of all, we tore a slice of bread up into bite size pieces, to give the same effect as chewing. Then we added some saliva (water!) Next, we imagined the food had travelled down our oesophagus (food pipe) and into our stomach.
We added some stomach acid (cola!) to the bags and then gently squeezed and moved the bag around for a couple of minutes. This gave the effect of the stomach muscles working to break up the food.
We were amazed at how the bread disintegrated and dissolved so quickly in the stomach acid, leaving a sludgy liquid which could pass easily into the next part of the digestive system. Here are some photos of our stomachs!