These animals all consume diets that require little storage of food, no predigestion with gastric juices, or both.The gastric lining is usually divided into two regions, an anterior portion lined by fundic glands and a posterior portion lined with pyloric glands. Cardiac glands are unique to mammals, and even then are absent in a number of species. The distributions of these glands vary between species, and do not always correspond with the same regions as in humans. Furthermore, in many non-human mammals, a portion of the stomach anterior to the cardiac glands is lined with epithelium essentially identical to that of the oesophagus. Ruminants, in particular, have a complex stomach, the first three chambers of which are all lined with oesophageal mucosa.In birds and crocodilians, the stomach is divided into two regions. Anteriorly is a narrow tubular region, the proventriculus, lined by fundic glands, and connecting the true stomach to the crop. Beyond lies the powerful muscular gizzard, lined by pyloric glands, and, in some species, containing stones that the animal swallows to help grind up food.In insects there is also a crop. The insect stomach is called the midgut. Information about the stomach in echinoderms or molluscs can be found under the respective articles. Additional images
See also
Gastroesophageal reflux disease
Human gastrointestinal microbiota
Proton-pump inhibitor

References
External links

Stomach at the Human Protein Atlas
"Stomach" article from the Encyclopedia of Nursing & Allied Health, from enotes.com
Digestion of proteins in the stomach or tiyan
Site with details of how ruminants process food
Control of Gastric Emptying Archived 2019-11-12 at the Wayback Machine
This procedure has been shown to be beneficial in 50% of cases. Epidemiology
This syndrome is predominantly found in young women, but also occurs in children, teenagers and octogenarians. == References ==