Digestive System experiment

Lesson: Science

Class: Year 4 Year: 2018-2019

This half term, we have been looking at teeth and the digestive system. This afternoon, we did a science experiment to demonstrate what happens in the digestive system. 

First, we put a banana and cream crackers (food), water (saliva) and orange juice (stomach acid) into a sealable bag. Then we mixed this by scrunching the mixture together- food is broken up like this in the mouth and stomach. Then we put the mixture into one leg of a pair of tights (small intestine). We squeezed the liquid out. We know that in the small intestine, vitamins and minerals are absorbed to keep us healthy and energised. After that we put the mixture into a paper cup (large intestine). We pushed what was left through a small hole in the paper cup. We know that our body excretes any waste products that we don't need. 

We had fun learning about the digestive system (and making a mess!).

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