What materials can you use to make a digesting system

Question

i need to make a 3D model of the digestive system, from the mouth to the a**s, any ideas on what i can use

Answer 1

Lol Materials?

Answer 2

Mouth: chattering teeth?

Esophogus: long rubber tubing or one of those black pipes with ridges along its entire length

Stomach: water canteen, one of those leathery pouches or just a moon-shaped bag of some sort.

Small intestine: lots and lots of tubing, all in a bundle.

Large intestine: less tubing, but it needs to be much much thicker.

Colon + a**s: uhh...glue a ring to the end of the tubing for the large intestine? I'm not sure about this one o.O