Gastric fold

The gastric folds (or gastric rugae) are coiled sections of tissue that exist in the mucosal and submucosal layers of the stomach. They provide elasticity by allowing the stomach to expand when a bolus enters it; these folds stretch outward through the action of mechanoreceptors which respond to the increase in pressure. This allows the stomach to expand, therefore increasing the volume of the stomach without increasing pressure. These folds provide the stomach with increased surface area for nutrient absorption during digestion. Gastric folds may be seen during esophagogastroduodenoscopy or in radiological studies.Drawing of the interior of the stomach. The gastric folds (or gastric rugae) are coiled sections of tissue that exist in the mucosal and submucosal layers of the stomach. They provide elasticity by allowing the stomach to expand when a bolus enters it; these folds stretch outward through the action of mechanoreceptors which respond to the increase in pressure. This allows the stomach to expand, therefore increasing the volume of the stomach without increasing pressure. These folds provide the stomach with increased surface area for nutrient absorption during digestion. Gastric folds may be seen during esophagogastroduodenoscopy or in radiological studies. This layer releases stomach acid. It is the innermost layer of the stomach Affected by the hormone histamine which signals it to release Hydrocholoric acid (HCL). This layer consists of different vessels and nerves, ganglion neurons, and adipose tissue. It is the second layer of the stomach and supports the mucosa. Thickening of the gastric folds may be observed by endoscopy or radiography and may aid in the differential diagnosis of many disease processes including: The folds become very thick due to inflammation.