Did you know if you unfolded your intestines, they'd be taller than a giraffe? Yep, they form a digestive tube so lengthy it's got two sections. The so-called small intestine is about 22 feet long ...

This is a common experiment used to model the digestive system and will help you understand how to work scientifically. Put 1cm³ of amylase enzyme into tube 1 but not tube 2. Leave at room ...