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HistologyTypes of tissuesMuscularis mucosae
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HistologyTypes of tissuesMuscularis mucosae

Muscularis mucosae

Author: Christina Loukopoulou, MSc • Reviewer: Declan Tempany, BSc (Hons)
Last reviewed: March 13, 2024
Reading time: 1 minute

Recommended video: Stomach histology [29:47]
Have a thorough look at stomach under the microscope.
Muscularis mucosae
Lamina muscularis mucosae
1/5
Synonyms: Muscular layer of mucosa

The muscularis mucosae comprises the outermost layer of the mucosa in the histological arrangement of the gastrointestinal tract. It is found in the walls of the gastrointestinal tract specifically from the esophagus to the upper portion of the rectum.

The muscularis mucosae clearly defines the border between the mucosa and the submucosa.

Structurally, it is composed of elastic fibers and thin layers of smooth muscle cells, generally arranged in an outer longitudinal and inner circular layer.

This arrangement keeps the mucosa and underlying glands in a constant state of gentle agitation which helps to expel contents of gastric glands and intestinal crypts, respectively. It also enhances contact between the epithelium and the contents of the lumen.

Terminology English: Muscularis mucosae
Synonym: Muscular layer of mucosa

Latin: Lamina muscularis mucosae
Definition The muscularis mucosae comprises the outermost layer of the mucosa in the histological arrangement of the gastrointestinal tract.

Learn more about the histological arrangement of the stomach with the following study unit:

Stomach Explore study unit

Sources

All content published on Kenhub is reviewed by medical and anatomy experts. The information we provide is grounded on academic literature and peer-reviewed research. Kenhub does not provide medical advice. You can learn more about our content creation and review standards by reading our content quality guidelines.
  • Moore, K. L., Dalley, A. F. and Agur, A. (2017). Clinically oriented anatomy (8th ed.). Lippincott Williams and Wilkins.
  • Ross, M. H. Pawlina, W. (2011). Histology : a text and atlas : with correlated cell and molecular biology (6th ed.). Wolters Kluwer/Lippincott Williams & Wilkins Health.
  • Standring, S. (2016). Gray's Anatomy (41st ed.). Edinburgh: Elsevier Churchill Livingstone.

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