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Related Concept Videos

Histology of the Small Intestine01:27

Histology of the Small Intestine

The small intestine exhibits a unique histological structure that significantly enhances its function in digestion and nutrient absorption. These structures include circular folds, villi, and various specialized cells that collectively facilitate the digestion of food.
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
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Small Intestines
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Related Experiment Video

Updated: Jul 20, 2026

The Role of Anatomical Dissection in Defining Colic and Small Bowel Artery Lymphovascular Bundles in the D3 Volume of Small and Large Bowel Mesentery
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Macroscopic and microscopic intermesenteric communications.

David Kachlik1, Vaclav Baca

  • 1Department of Anatomy, 3rd Medical Faculty, Charles University, Ruska 87, Praha, Czech Republic. david.kachlik@lf3.cuni.cz

Biomedical Papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia
|August 29, 2006
PubMed
Summary

This study details intermesenteric connections crucial for colon vascular health, revealing an accessory anastomosis in 7.9% of cases and Riolan's arcade in 95%. These findings aid in understanding and managing colon ischemia.

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Area of Science:

  • Anatomy
  • Vascular Surgery
  • Gastroenterology

Background:

  • Intermesenteric communications are vital for colonic vascular integrity.
  • Understanding these connections is crucial for managing conditions like ischemia and necrosis.
  • Mesenteric vascular networks play a key role in preventing tissue death during obstruction.

Purpose of the Study:

  • To comprehensively describe all levels of intermesenteric communications.
  • To highlight the significance of these connections in colonic vascular diseases.
  • To classify observed intermesenteric connections.

Main Methods:

  • Analysis of 40 mesenteric artery angiograms.
  • Dissection of 36 cadaverous large intestine samples with mesentery and feeding vessels.
  • Injection techniques using India ink (24 samples) and methylmetacrylate Mercox (41 samples) for detailed visualization.

Main Results:

  • Anastomosis intermesenterica accessoria was identified in 7.9% of cases, classified per Pikkieff's proposal.
  • Riolan's arcade (Haller's anastomosis) was present in 95% of cases, forming an arch at the left colic flexure.
  • Infrequent anastomoses between straight vessels and intestinal wall plexuses were noted, with no significant regional variations.

Conclusions:

  • Intermesenteric connections, including Riolan's arcade and accessory anastomoses, are significant anatomical findings.
  • These vascular pathways are important for collateral circulation in the colon, potentially preventing ischemia.
  • The study provides a detailed anatomical description relevant to colonic vascular pathology.