Modelling Digestion

Class: Class C - Year 4 Year: 2019-20

In Science we have been learning about digestion. We have done a practical lesson modelling how our bodies digest food. We really enjoyed doing this lesson!

First we put banana and weetabix into a bowl (our mouth). We crushed the food with a fork (our teeth) and added water (saliva).

We put the food into a piping bag, (oesophagus), squeezing it to the bottom.

The piping bag was then cut at the bottom and the food was sqeezed into a freezer bag (the stomach).

In the stomach the food mixed with the stomach acid, (green food coloured water).  

We cut a small hole in the bottom of the freezer bag and sqeezed the mixture into the tights (intestine).

The tights were squeezed to move the food along it and some of the liquid passed through the small holes in the tights. This demonstrated how the body absorbs the water, salt and 'goodness' into the body.

We cut a small hole in the bottom of the tights so the solid faeces that was left could pass out of the body (rectum).

The faeces was sqeezed out onto a plate (the toilet).