This week in Science, KS3 have been learning all about the digestive system. We created a (disgusting) model to show this important process.
First, we placed a wheat biscuit and half a banana on a dish. We added water (saliva) and used a pair of forks (teeth) to cut and grind the food.
After that, we added the mixture to a Ziplock bag (stomach) and poured a small cup of orange juice (the stomach acids) into the bag. We then squeezed the bag until the contents are mushy to represent food being broken down in the stomach.
Then, we poured the contents of the ‘stomach’ into one leg of the tights (the intestines) and squeezed the tights over the dish. The liquid that pours out represents the nutrients that are absorbed into our body.
Finally, we cut a hole in the bottom of the tights and pushed the waste through the hole in the bottom, representing the waste leaving our body.