A model of a horse's digestive system, laid out to make identification of different parts. 

Based on an image from Practical Horseman, in a publication that printed in Oct. 2009, found on a website dated Nov. 2012 HERE.

Printed in PLA with 0.4 layers, normal grid. supports at 45 degrees. Came out pretty well first try. This was printed for a horse conference for people in the equine vet med community, and thought to share for anyone who may be interested.