The digestive system

The length of the digestive tract

The length of the digestive tract


Materials required:

string, a tape measure, scissors



Use the string to show the length of an 'unravelled' digestive tract:

  • mouth cavity: ___ centimetres
  • oesophagus: ___ centimetres
  • stomach: ___ centimetres
  • small intestine: ___ metres
  • large intestine: ___ metre


First, try to estimate these amounts.

Then carry out the experiment again, this time using a tape measure.

How accurate was your estimate? Was it too low? Was it too high?