Omentum.pptx

Digestive system Stomach Anatomy

1. Greater Omentum & Lesser Omentum Amit Sharma Roll no 09 MBBS 2020

2. Content Greater Omentum Introduction Contents Attachments Funnctions Lesser Omentum Introduction Attachments Contents

3. Greater Omentum It is a la rge fold of peritoneum which hangs down from the greater curvature of the stomach like an apron and covers the loops of intestines to a varying extent. Made up of 4 layers of peritoneum Contents R ight an d le f t ga s t roe p iploic v e ss els Fat

4. Attachments Anterior two layer descend and fold fold upon themselve to form posterior two layer which ascend to anterior surface of head and anterior border of body of pancreas.

5. Attachments

6. Functions I t is a s t or e h o u s e o f f at . It protects the peritoneal cavity against infection (collection of macrophages form milky spot ) Also known as “ policeman of the abdomen ”

7. LESSER OMENTUM This is a fold of peritoneum which extends from the lesser curvature of the stomach and the first 2 cm of the duodenum to the liver. Portion of lesser Omentum form hepatogastric ligament and hepa t oduodenal liga m en t . Attachments: Inferiorly: lesser curvature of stomach and duodenum Superiorly: liver in the form of an inverted ‘L’. Bottom of fissure for ligamentum venosum and margin of porta hepatis

8. The attachments and contents of the lesser omentum. The liver has been turned upwards so that its posteroinferior surface can be seen

9. Contents: The right free margin of the lesser omentum contains: The proper hepatic artery The portal vein The bile duct Lymph nodes & lymphatics Hepatic plexus of nerves Along lesser curvature of stomach and duodenum The right gastric vessels The left gastric vessels Gastric group of lymph node and lymphatics Branches from gastric nerves

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