There are also many differences between the Ruminant and Non-Ruminant digestive tracts. Most of these differences are when it comes to the stomach. A Non-Ruminant stomach is structured as a tank that holds all food, digesting it as food sits in it. A Ruminant digestive tract stomach is much more complicated. It's separated into four sections, the omasum, the rumen, the reticulum, and the abomasum. These four parts work together to digest, break down, and filter harmful things out of their food.