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  • tract
  • While the length of the intestinal tract contains lymphoid tissue, only the ileum has abundant Peyer's patches, unencapsulated lymphoid nodules that contain large numbers of lymphocytes and other cells of the immune system. (wikipedia.org)
  • mesenteric
  • The ileocaecal flexure arises at the point where the ileum is continuous with the caecum around the ileocaecal mesenteric flexure. (wikipedia.org)
  • The ileum, along with the jejunum, is suspended inside the mesentery, a peritoneal formation that carries the blood vessels supplying them (the superior mesenteric artery and vein), lymphatic vessels and nerve fibers. (wikipedia.org)
  • large
  • In the horizontal and ascending portions of the duodenum and upper half of the jejunum they are large and numerous, but from this point, down to the middle of the ileum, they diminish considerably in size. (wikipedia.org)
  • An underlying lamina propria composed of loose connective tissue and containing germinal centers and large aggregates of lymphoid tissue called Peyer's patches, which are a distinctive feature of the ileum. (wikipedia.org)
  • long
  • In humans, the ileum is about 2-4 m long, and the pH is usually between 7 and 8 (neutral or slightly alkaline). (wikipedia.org)
  • blood
  • On the descending portion of the straight arterioles, NaCl and urea are reabsorbed into the blood, while water is secreted. (wikipedia.org)
  • On the ascending portion, NaCl and urea are secreted into the interstitium, while water is reabsorbed The slow blood flow in the straight arterioles makes them a likely location of thrombosis in hypercoagulable states, or tissue loss due to erythrocyte sickling in sickle cell disease. (wikipedia.org)