Anatomy and Histology for Diagnosis of Small Intestinal Diseases Seiji Haraoka 1 , Akinori Iwashita 1 1Department of Pathology, Chikushi Hospital, Fukuoka University, Fukuoka, Japan Keyword: 十二指腸 , 空腸 , 回腸 , 解剖組織学的特徴 , Peyer板 pp.396-402
Published Date 2008/4/24
DOI https://doi.org/10.11477/mf.1403101311
  • Abstract
  • Look Inside
  • Reference
  • Cited by

 The small intestine consists of duodenum which is the retroperitoneal organ and intestinum tenue mesenteriale which is the mesenteric portion of the small intestine. The latter is divided into the jejunum and ileum. The inner side of the small intestine is characterized by the presence of transverse mucosal folds known as Kerckring's folds and villi that line the mucosa. They are prominent from the descending part of the duodenum to the proximal jejunum. In the duodenum, the mucosa and submucosa contains numerous mucus-secreting glands known as Brunner's glands that are not seen in other parts of the gastrointestinal tract. The mucosal epithelium forms the crypts, which contain enteroendocrine cells and Paneth's cells at the base of the crypts. The enteroendocrine cells are most abundant in the duodenum, and the number decreases from jejunum to ileum. Paneth's cells are prominent in the ileum. The lymphatic apparatus multifariously develops in the intestinal mucosa. Especially, Peyer's patches seen in the ileum are very important lymphoid tissue that constitutes the host defense mechanisms offered by the mucosal immune system mainly composed of secretory IgA, and have characteristic morphology and functions not seen in other organs.

Copyright © 2008, Igaku-Shoin Ltd. All rights reserved.


電子版ISSN 1882-1219 印刷版ISSN 0536-2180 医学書院