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Duodenum 3D

  • Description                                              
    • * Is the shortest, widest and most fixed part of the small intestine.
    • * Extends from the pylorus to duodenojejunal flexure.
    • * Lies above the level of umbilicus, opposite first, second and third lumbar vertebrae.
    • * Is retroperitoneal except for the beginning of the first part, which is connected to the liver by the hepatoduodenal ligament of the lesser omentum.
    • * Receives blood from the celiac and superior mesenteric artery.

 

  • Superior Part:
    • * Begins at the pylorus, passes backwards, upwards and to the right to meet the second part at the superior duodenal flexure.
    • * Has a mobile or free section, termed the duodenal cap, into which the pylorus invaginates.

 

  • Descending Part                                            
    • * Begins at the superior duodenal flexure, passes downwards to reach the lower border of the third lumbar vertebra, where it curves towards the left at the inferior duodenal flexure to become continuous with the third part of duodenum.
    • * Contains the junction of the foregut and midgut, where the common bile and main pancreatic ducts open.

 

  • Transverse Part
    • * Is the longest part and crosses the IVC, aorta, and vertebral column to the left.
    • * Is crossed anteriorly by the superior mesenteric vessels.

 

  • Ascending Part                                          
    • * Ascends to the left of the aorta to the level of the second lumbar vertebra and terminates at the duodenojejunal junction.
    • * Is mostly retroperitoneal and covered with peritoneum only anteriorly.

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  • Description                                              
    • * Is the shortest, widest and most fixed part of the small intestine.
    • * Extends from the pylorus to duodenojejunal flexure.
    • * Lies above the level of umbilicus, opposite first, second and third lumbar vertebrae.
    • * Is retroperitoneal except for the beginning of the first part, which is connected to the liver by the hepatoduodenal ligament of the lesser omentum.
    • * Receives blood from the celiac and superior mesenteric artery.

 

  • Superior Part:
    • * Begins at the pylorus, passes backwards, upwards and to the right to meet the second part at the superior duodenal flexure.
    • * Has a mobile or free section, termed the duodenal cap, into which the pylorus invaginates.

 

  • Descending Part                                            
    • * Begins at the superior duodenal flexure, passes downwards to reach the lower border of the third lumbar vertebra, where it curves towards the left at the inferior duodenal flexure to become continuous with the third part of duodenum.
    • * Contains the junction of the foregut and midgut, where the common bile and main pancreatic ducts open.

 

  • Transverse Part
    • * Is the longest part and crosses the IVC, aorta, and vertebral column to the left.
    • * Is crossed anteriorly by the superior mesenteric vessels.

 

  • Ascending Part                                          
    • * Ascends to the left of the aorta to the level of the second lumbar vertebra and terminates at the duodenojejunal junction.
    • * Is mostly retroperitoneal and covered with peritoneum only anteriorly.

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