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Gastrointestinal tract

Synonyms: GI tract, gastrointestinal canal
Abbreviations: GIT, GIC
German: Gastrointestinaltrakt

1 Definition

The gastrointestinal tract is defined as the main part of the digestive system that extends from the oesophagus to the anus. It consists of the following organs:

Note: some authors distinguish between the gastrointestinal tract and the "digestive system", which then also includes the so-called "intestine head", particularly the oral cavity, salivary glands and pharynx.

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2 Classification

  • Upper gastrointestinal tract: Includes the oesophagus, the stomach and the duodenum.
  • Lower gastrointestinal tract: Includes the jejunum, ileum, cecum, colon, sigmoid colon and rectum.

3 Histology

The gastrointestinal tract is, along its entire course, a typical structure of different layers of tissue, which form the intestinal wall. This structure differs slightly between the foregut and the intestine hull.

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