Digestion a thin-walled expanded portion of the alimentary tract used for the storage of food prior to digestion. In some birds it is an expanded, muscular pouch near the gullet or throat. In adult doves and pigeons, the crop can produce crop milk to feed newly hatched birds. Certain insects may have a crop or enlarged esophagus. Herbivores have evolved cecums (or an abomasum in the case of ruminants). Ruminants have a fore-stomach with four chambers. These are the rumen, reticulum, omasum, and abomasum. In the first two chambers, the rumen and the reticulum, the food is mixed with saliva and
Ileo-anal pouch and discomforts as their body compensates for the loss of such an important organ. Many patients experience the inability to sleep through the night, a drastically changed diet, severe and frequent gas pain, nutrient deficiencies, and the inability to digest certain foods. In some cases where the pouch was formed to manage colitis, inflammation can return to the pouch in a similar way to the original inflammation in the colon. This is known as pouchitis. The surgical procedure for forming an ileo-anal pouch (jpouch) was pioneered by Sir Alan Parks at St. Mark's Hospital in London in the mid to