Linked from
The 9 pages that link to Cecum, each with the reason it gives.
Hindgut fermentationRelated: It is a major fermentation chamber in horses and rabbits.
LagomorphaRelated: The enlarged cecum hosts fermentation that helps lagomorphs digest plant fiber.
RodentiaRelated: An enlarged cecum helps many rodents digest fibrous plant material.
IleumRelated: The ileum opens into the cecum through the ileocecal valve.