The reticulorumen represents the first chamber in the alimentary canal of ruminant animals. It's composed of the rumen and reticulum. The reticulum differs from the rumen with regard to the texture of its lining. The rumen wall's covered in small finger like projections called, which are flattened, approximately 0.5 cm in length and 0.3 cm wide in cattle. The reticulum's lined with ridges that form a hexagonal honeycomb pattern. The ridges are approximately 0.1 - 0.2 mm wide and are raised 0.5 c… (More on Reticulorumen)