Introduction
61+62
STOMACH
(Intraperitoneal)
- Definition: the most dilatable part of the digestive system, connecting esophagus to duodenum.
- Site: occupies part of left hypochondrium, epigastrium, and umbilical regions.
- Shape: the stomach is J-shaped (most common, steer horn (less common)
- The stomach has:
- 2 ends
- 2 borders (curves)
- 2 surfaces
- 2 parts
Ends of the stomach:
1. Cardiac
- At junction between esophagus and stomach.
- 1 inch to the left from median plane (behind 7th costal cartilage).
- Related anteriorly to left lobe of liver.
- It has no anatomical sphincter (physiological sphincter)
- Esophagus enter the stomach at an acute angle.
2. Pyloric
- At junction between stomach and small intestine.
- 1 inch to the right of the median plane (at L1 level) (?).
- Related anteriorly to quadrate lobe of liver.
- It has anatomical sphincter (marked by circular groove and vein of Mayo, connecting right gastric and right gastroepiploic veins).
Curves of the stomach:
1. Lesser Curve:
- Concave, small, right border.
- It shows the angular notch
- Provides attachment to the Lesser omentum (right and left gastric arteries run between its 2 layers).
2. Greater Curve:
- Convex, large, left border.
- It shows the cardiac notch.
- It shows the pyloric antrum opposite the angular notch.
- Provides attachments for gastro-phrenic, gastro-splenic ligaments + anterior 2 layers of greater omentum (with right and left gastroepiploic vessels running between them).