Small intestine

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kayla MATTEW AND ERIKA

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Small intestine

  1. 1.  part of the gastrointestinal tract following the stomach and followed by the large intestine where much of the digestion and absorption of food takes place primary function is to absorb the nutrients and minerals found in food
  2. 2.  average length of the small intestine  in an adult male - 22 feet 6 inches (6.9 m)  in the adult female - 23 feet 4 inches (7.1 m)
  3. 3. The small intestine is where most digestion takes place.It is structurally divided into three parts: › duodenum › jejunum › ileum
  4. 4.  major distinguishing feature is the presence of duodenal (Brunners) glands in the submucosa where most of the breakdown of food in the small intestines occurs. mucous cells of these glands produce an alkaline secretion protects the duodenal lining from the acidity of the chyme raises the luminal pH to the optimum level for pancreatic enzyme activity also the point of entry for the bile and pancreatic ducts exhibits fingerlike or leaflike villi few goblet cells
  5. 5. The duodenum consists of four parts, with the first three forming a "C" shape. › first or superior part begins at the pylors, passing laterally for a short distance before curving into the superior duodenal flexure › second or descending part passes from the superior into the inferior duodenal flexure › third or inferior part passes from the inferior flexure, crossing the major artery and the major vein and also the spinal column › forth or ascending part passes over the aorta, and curves past the pancreas to the duodenojejunal flexure
  6. 6. Duodenum-Brunners Glands
  7. 7.  has long leaflike vilii many plicae circulares an intermediate number of goblet cellsThe key to its identification is that although it has villi (part of the small intestine), it doesn’t contain Brunners glands or Peyers patches.
  8. 8.  final and longest section of the small intestine jejunum and ileum both suspended by a double layer of peritoneum that allows these parts to move more freely within the abdomen responsible for the final stages of protein and carbohydrate digestion has fewer villi, which are short and broad- tipped (clublike) relatively abundant goblet cells
  9. 9. Goblet Cells
  10. 10.  colon cancer Small bowel bacterial overgrowth syndrome Paralytic ileus Maropthisis Crohns disease Celiac disease Carcinoid Meckels Diverticulum Gastric dumping syndrome Infectious diseases Mesenteric ischemia Intussusception

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