The structure that extends from the pyloric junction of the stomach to the duodenojejunal junction. It is divided into 4 parts for ease of description.
Arteries
These are by two main arteries
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Superior pancreaticoduodenal artery from the gastroduodenal artery supplying the proximal (foregut) part. |
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Inferior pancreaticoduodenal artery from superior mesenteric artery, supplying the distal (midgut) part |
The intraperitoneal first part receives further supply from the following arteries
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Retroduodenal branch of gastroduodenal artery |
Veins:
The veins are run with the arteries but have different drainage patterns.
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Superior pancreaticoduodenal vein drains into the superior mesenteric vein. |
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Inferior pancreaticoduodenal vein drains into the superior mesenteric vein |
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Right gastric vein drains directly close to its origin at the level of neck of pancreas |
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Right gastroepiploic vein drains into superior mesenteric vein |
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Retroduodenal vein drains into superior mesenteric vein |
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All veins drain into the portal vein, which enters the liver. |
Nerves:
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Parasympathetic fibers are those which have reached the celiac plexus from the anterior and posterior vagus. |
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Sympathetic fibers are the splanchnic nerves entering the celiac plexus |
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Introduction
Cell Biology Histology Embryology Gross anatomy Lymphatic drainage Organ integration Clinical anatomy Quiz |
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The
Human Anatomy Laboratory
Creator: Oluwole Ogunranti
1- first part, 2- second part, 3- third part, 4- fourth part of duodenum