Monogastri c (simple stomach animals) and ruminants are the two main types of mammals based on their types of digestive systems. there are more monogastric/simple stomach animals, yet the ruminants are very important in the entire biosphere. ruminants are the reason you don’t have to eat grass..
Ruminant animals are polygastric, meaning their stomach is divided into compartments. some of the compartments have microorganisms that ferment the cellulose in the vegetables they eat into cud, which is easier to digest. hi colin, sloths are not true ruminants, but they do have three chambered stomachs and can take up to a month to digest.