What structure of the rat will you not find in the human digestive system?

One structure of the rat that is not found in the human digestive system is the cecum, which is significantly larger and more developed in rats. In rats, the cecum serves as a fermentation chamber for breaking down cellulose from plant materials, aiding in digestion. While humans do have a cecum, it is much smaller and does not perform the same functional role in digestion.