The role of the cecum is mainly to accommodate the digested and absorbed food residue, absorb the water from it and finally form feces. The cecum holds the digested and absorbed food residue and absorbs the fluids and electrolytes from it to form feces in conjunction with the rest of the large intestine. The ileocecal valve also restricts flow and prevents reflux: the ileocecal valve prevents the contents of the small intestine from flowing too quickly into the large intestine, so that the food can be fully digested and absorbed in the small intestine, and prevents the food residue that enters the large intestine from flowing back into the small intestine. The cecum is the beginning of the large intestine and is about 6 to 8 centimeters long. The cecum is also the section of the large intestine with the thickest diameter and the most pathways. The cecum is located in the right iliac fossa and hangs down into the pelvis when upright, with its body projection over the lateral half of the inguinal ligament. The cecum is usually intraperitoneal and has no mesentery, so its position is relatively fixed.