Polar bears are a carnivore animal and they digestive tract is made just for that reason. The digestive system consist of a mono gastric digestive system, and a small intestine with no cecum (a pouch connecting the junction of the small and large intestine). All of bear spices cannot digest cellulose because of the small intestine and no cecum. A polar bears anatomy of their digestive system is not presented, but scientist have discovered that they are similar to a black bear. They've discovered that the small intestine is much shorter than the black bears. Here is a picture of what the black bears anatomy looks like: