The development and structure of the mesentery
Kevin G Byrnes1,2, Dara Walsh1,2, Leon G Walsh1,2
1Department of Surgery, University of Limerick Hospitals Group, Limerick, Ireland.
Communications Biology
|August 19, 2021
Summary
The abdomen contains a single mesentery connecting all digestive organs, challenging the traditional multiple mesentery model. This finding reveals a fundamental two-domain organization of abdominopelvic structures.
Area of Science:
- Anatomy
- Developmental Biology
- Surgical Anatomy
Background:
- Current abdominal anatomy models describe multiple mesenteries within the peritoneal framework.
- Recent research suggests a single mesentery may connect all digestive organs, but direct evidence is lacking.
Purpose of the Study:
- To investigate the development and overall structure of the mesentery.
- To confirm or refute the existence of a single, unified mesentery in the abdomen.
Main Methods:
- Developmental analysis of the mesentery.
- Morphological examination of the entire mesenteric structure.
- Comparative anatomical analysis across species.
Main Results:
- Confirmed the existence of a single mesentery anchoring all abdominal digestive organs.
- Identified two distinct anatomical domains: mesenteric and non-mesenteric.
- Observed similar organizational patterns in various animal species.
Conclusions:
- The abdomen is fundamentally organized into a visceral (mesenteric) and somatic (musculoskeletal) frame.
- This single mesentery model clarifies the positional anatomy of abdominopelvic organs, vasculature, and peritoneum.
- Provides a new framework for systemic characterization of abdominal anatomy.
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