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Year 4 learn the ‘ins and outs’ of the digestion system.

First Mrs Cowan showed us some objects such as a pair of tights, a biscuit, a banana, orange juice, water, plastic bag, cup and a plate. We broke the biscuit into pieces and dropped it into the plastic bag. We added water (saliva) and orange juice (stomach acid). We took turns to squelch the bag in our hands and watch the biscuit become soft and mushy. This represented the food being digested inside our stomachs. Then the mixture was poured into a foot from the tights (the small intestine). Mrs Cowan squeezed the mixture through the tights so that the liquid (nutrients) came through the tights and on to a plate (our body). The mixture that was left inside the tight was dry and not useful to us (waste). It was pushed into a plastic cup (large intestine) where it turned into faeces. Eventually they were pushed out of the cup (anus) and into a bowl (the toilet). It was disgusting and quite funny! We also imagined what it must be like to be eaten and wrote our own Diary of a Biscuit.

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