Duodenum Anatomy PDF
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Ahmed
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Summary
These notes describe the anatomy of the duodenum, a part of the small intestine. They cover the duodenum's structure, location in relation to other organs, and its various parts. The anatomical positional relationships are clearly explained.
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duodenum AHMED NOTES The duodenum is a C-shaped tube, about 10 in. (25 cm) long, which joins the stomach to the jejunum. It receives the openings of the bile and pancreatic ducts. The duodenum curves around the head of the pancreas. The first inch (2.5 cm) of the duodenum resembles the sto...
duodenum AHMED NOTES The duodenum is a C-shaped tube, about 10 in. (25 cm) long, which joins the stomach to the jejunum. It receives the openings of the bile and pancreatic ducts. The duodenum curves around the head of the pancreas. The first inch (2.5 cm) of the duodenum resembles the stomach in that it is covered on its anterior and posterior surfaces with peritoneum and has the lesser omentum attached to its upper border and the greater omentum attached to its lower border; the lesser sac lies behind this short segment. The remainder of the duodenum is retroperitoneal, being only partially covered by peritoneum Except at 2 regions: - 1st part which is attached to lesser {above} and greater {below} omenta. - 4th part which is attached to lig. Of tertiz 1st part begins at the pylorus and runs upward and backward on the transpyloric plane at the level of the 1st lumbar vertebra The second part of the duodenum runs vertically downward in front of the hilum of the right kidney on the right side of the 2nd and 3rd lumbar vertebrae Anteriorly: The fundus of the gallbladder and the right lobe of the liver, the transverse colon, and the coils of the small intestine Posteriorly: The hilum of the right kidney and the right ureter Laterally: The ascending colon, the right colic flexure, and the right lobe of the liver) Medially: The head of the pancreas, the bile duct, and the main pancreatic duct The third part of the duodenum runs horizontally to the left on the subcostal plane, passing in front of the vertebral column and following the lower margin of the head of the pancreas 4th part It runs upward, on or immediately to the left of the abdominal aorta, from the pend of the third part to the upper border of the L2 vertebra where it turns forward (ventrally) to become continuous with the jejunum (duodenojejunal flexure). Anteriorly: Transverse colon and transverse mesocolon. Posteriorly: Left psoas major muscle, left sympathetic chain, left gonadal vessels, and inferior mesenteric vein. Superiorly: Body of the pancreas. On to the left: Left kidney and left ureter. On to the right: Upper part of the root of mesentery.
