AYA ANATOMY
stomach
• The stomach is a dilated part of the alimentary canal betwe
• It is a muscular sac.
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• It is a J-shaped.
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stomach
• It occupies the left upper quadrant, epigastric, and umbilica
• Stomach located at level of T10 and L3 vertebral.
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• Position of the stomach varies with body habitués.
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stomach
The stomach is divided into four regions:
1.The cardia, which surrounds the opening of the esophagus into the stomach.
2.The fundus of stomach, which is the area
above
thethe
level
of the
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textcardial
formatorifice.
3.The body of stomach, which is the largest region of the stomach.
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4.The pyloric part, which is divided into the pyloric
antrum
and pyloric
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Stomach
stomach
• Surfaces
• Antero-superior Surface
• Postero-inferior Surface
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stomach
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• Openings:
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–Gastroesophageal: To esophagus
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–Pyloric: To duodenum
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stomach
Sphincters
The cardiac sphincter (lower esophagus sphincter) closes
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The pyloric sphincter closes off the bottom.
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stomach
Other features of the stomach include:
• The greater curvature, which is a point of attachment for th
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• The lesser curvature, which is a point of attachment for the
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stomach
• the cardial notch, which is the superior angle created when
• the angular notch, which is a bend on the lesser curvature.
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stomach
Layers of peritoneum atta
 Lesser omentum: attac
 Greater omentum: attac
Read about:
• Lesser omentum
• Greater omentum
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stomach
atomical Relation
Antero-superior Surface
• The left half of this surface is in contact with the diaphragm
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• The right half is in relation with
the
and quadrate
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atomical Relation
• The Postero-inferior Surface is in relation with the diaphrag
• These structures form a shallow bed, the stomach bed, on
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atomical Relation
atomical Relation
Blood Supply
Arterial blood supply:
– 3 Branches
– Left Gastric Artery
– Supplies the cardia of the stomach and distal esophagus
– Splenic Artery
– Gives rise to 2 branches which help supply the greater curvature of the stomach
• Left Gastroepiploic
• Short Gastric Arteries
– Common Hepatic or Proper Hepatic Artery
– 2 major branches
• Right Gastric- supples a portion of the lesser curvature
• Gastroduodenal artery
•
-Gives rise to Right Gastroepiploic artery
•
-helps supply greater curvature in conjunction
with Left
Blood Supply
Blood Supply
enous Drainage
• Venous Drainage
 Parallels arterial supply
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• Rt &Lt gastric veins drain to the portal
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• Rt gastroepiploic drains to the SMV
• Lt gastroepiploic drains to the splenicThird Outline Level
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enous Drainage
mphatic Drainage
– Lymph from the proximal portion of the stomach drains along the le
– Distal portion of lesser curvature drains through the suprapyloric no
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mphatic Drainage
– Proximal portion of the greater curvature is supplied by the lympha
– Antral portion of the greater curvature drains into the subpyloric an
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mphatic Drainage
Innervations
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The main innervations are Left and Right Vagus Nerves.
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Innervations
• Parasympathetic innervation of Stomach- Vagus Nerve
– 90% of fiber in vagal trunk is afferent (info transmitting from stoma
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• Sympathetic innervation of StomachSplanchnic Nerve
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– Derived from spinal segement T5-T10
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Innervations
Innervations