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The gastric folds (or gastric rugae) are coiled sections of tissue that exist in the mucosal and submucosal layers of the stomach. [1] 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. [2]
Diagram of the alkaline mucous layer in the stomach with mucosal defense mechanisms. The gastric mucosa is the mucous membrane layer of the stomach, which contains the gastric pits, to which the gastric glands empty. In humans, it is about one mm thick, and its surface is smooth, soft, and velvety.
CT abdomen, coronal section, showing characteristic large rugal folds in the stomach. A cyst is also seen in the liver. The large folds of the stomach, as seen in Ménétrier disease, are easily detected by x-ray imaging following a barium meal or by endoscopic methods. Due to the thickened rugae folds, it is said to have a cerebriform (brain ...
The epithelium, the most exposed part of the mucosa, is a glandular epithelium with many goblet cells. Goblet cells secrete mucus, which lubricates the passage of food along and protects the intestinal wall from digestive enzymes. In the small intestine, villi are folds of the
For instance, mucosa in the stomach protects it from stomach acid, [2]: 384, 797 and mucosa lining the bladder protects the underlying tissue from urine. [8] In the uterus, the mucous membrane is called the endometrium, and it swells each month and is then eliminated during menstruation. [2]: 1019
Rugae folds behind the anterior teeth in the hard palate of the mouth. In anatomy, rugae (sg.: ruga) are a series of ridges produced by folding of the wall of an organ. [1]In general, rugae are a biological feature found in many organisms, serving purposes such as increasing surface area, flexibility, or structural support.
The mucosa lining the stomach is lined with gastric pits, which receive gastric juice, secreted by between 2 and 7 gastric glands. [ citation needed ] Gastric juice is an acidic fluid containing hydrochloric acid and digestive enzymes. [ 23 ]
A mucosal fold refers to a fold in any mucous membrane in the body. This may refer to: Gastric fold of the gastric mucosa; Transverse folds of rectum in the anal canal;