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Intestinal villi (sg.: villus) are small, finger-like projections that extend into the lumen of the small intestine. Each villus is approximately 0.5–1.6 mm in length (in humans), and has many microvilli projecting from the enterocytes of its epithelium which collectively form the striated or brush border .
Intestinal villus, refers to any one of the small, finger-shaped outgrowths of the epithelial lining of the wall of the intestine. Clusters of projections are referred as intestinal villi. Chorionic villi, found on the surface of the outermost membrane (the chorion) of the fetus; Arachnoid villi, located on the arachnoid membrane of the brain
The nuclei of the cells (located at the outer edges of the cells lining the walls of the crypts) are stained blue-gray with haematoxylin. As seen in panels C and D, crypts are about 75 to about 110 cells long. The average crypt circumference is 23 cells. [8] From the images, an average is shown to be about 1,725 to 2530 cells per colonic crypt.
Peyer's patches, located within the ileum of the small intestine, are an important part of the digestive tract's local immune system. They are part of the lymphatic system, and provide a site for antigens from potentially harmful bacteria or other microorganisms in the digestive tract to be sampled, and subsequently presented to the immune system.
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The park's elevation range from 20–60 metres (66–197 ft) with sparse rock outcrop. [3] The Mahaweli River flows from south to north through the centre of the park. The rich alluvial soil flood plains situated beside the river are featured by a number of shallow swampy depressions called "villus".
Located on the northwest coast lowland dry zone of Sri Lanka, the park is 30 km (19 mi) west of Anuradhapura and 26 km (16 mi) north of Puttalam (approximately 180 km (110 mi) north of Colombo). The park is 1,317 km 2 (508 sq mi) (131,693 hectares) in area and ranges from 0–152 m (0–499 ft) above sea level. Nearly one hundred and six lakes ...
The two branches are the Mahaweli River, which flows north into Koddiyar bay and the lesser Verugal Oya which flows north-east into the sea. The central riparian flood plain is featured by many old river channels and contain dispersed 'villus', the waterfilled basins around among the grassy plains. There are 20 such villus is located in the ...