The saliva contains enzymes that digest the tissues they swallow. Several common classes of enzymes digest these polymers. Both humans and other animals have amylases, so they can digest starches. Regional studies of the ability to digest lactose are also supportive. This reduces the ability of termites to efficiently digest the cellulose. Great whites have also been known to eat objects that they are unable to digest. Pepsin is a protease that can digest and damage stomach cells. They may swallow it unintentionally, but they are able to partially digest it. Exonucleases digest nucleic acids from the ends. He compared learning and gaining knowledge to how humans digest food. Its ability to digest cellulose is ascribed to the microbes in its gut. It is also considered easier to digest. It is supposed to be easy to digest. I'm still trying to digest everything. In general, the smaller the bean, the easier to digest.