Carcinoid tumors of the midgut (jejunum, ileum, appendix, and cecum) are associated with carcinoid syndrome. Supplies the cecum, ileum, and appendix. A cecal carcinoid tumor is a carcinoid tumor of the cecum. The ileum is the last part of the small intestine that ends in the cecum. It is connected to the small intestine by a section of bowel called the cecum. Rabbits are hindgut fermenters and therefore have an enlarged cecum. These hindgut fermenters digest cellulose in an enlarged cecum through the reingestion of the cecotrope. The small intestine has a mean length of and lacks a cecum. This means that most of their digestion takes place in their large intestine and cecum. Their pharynx is completely develop and connected to the cecum of the small intestines. They primarily affect the cecum and proximal colon. The gastrointestinal tract of domestic cats contains a small cecum and unsacculated colon. This is because the cecum, distended with gas, protects the inflamed appendix from pressure. The proximal part of the bud grows rapidly to form the cecum. They have no gall bladder, cecum, or appendix.