Digestive system models cheap price? in madison WI?

i need one for class and for cheap, and i dont know any deseases that is in the digestive tracts that i need to know for my poaster so if you know any, please tell me!
Answer:
go to a local clinic and ask them for phone number for the prevacid drug representative. Prevacid is a digestive system drug and this company makes very fine charts for digestive system disorders, ask the company representative if he/she can provide you with a chart or at least let you look at one, good luck

---