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Duodenum
The duodenum, into which the stomach opens, is about 25 cm long,
C-shaped andbegins at the pyloric sphincter. It is almost entirely
retroperitoneal and is the mostfixed part of the small
intestine.
The duodenum is
described as having fourparts:
1. Part one, superior part(SD)
2. Part two, descendingpart (DD)
3. Part three, horizontalpart (HD)
4. part four, ascending
part (AD)
The fourth part of theduodenum terminates at theduodenojejunal
flexure DJFwith the jejunum.
The ligament of Treitz is amusculofibrous band thatextends
from the upper
aspect of the ascending partof the duodenum to theright crus of
the diaphragmand tissue around the celiacartery.
As you can see, the head of the pancreas sits in the
C-shaped duodenum, so aslong as we are here, we
may as well point out thestructures here:
head of the pancreasPHuncinate process of thehead of the
pancreasPUPneck of the pancreasPN where the
superiormesenteric artery and
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vein pass behind the
pancreasbody of the pancreasPBtail of the pancreas PT.This part
is withinperitoneum and abutsthe spleen
The other structures in thearea are the:
inferior vena cava IVCportal vein PVaorta aortaceliac trunk
Ckidneys
Blood Supply of the Duodenum
superior pancreaticoduodenalanterior and posterior branches
inferior pancreaticoduodenalanterior and posterior branches
Most duodenal ulcers occur within 5 cm of the pylorus and most
frequently onthe anterior wall.
Stomach
Jejunum and Ileum
Abdominal CavityStomachIleum and JejunumLarge
IntestineLiverPancreasSpleen
http://www.wesnorman.com/spleen.htmhttp://www.wesnorman.com/pancreas.htmhttp://www.wesnorman.com/liver.htmhttp://www.wesnorman.com/largeintestine.htmhttp://www.wesnorman.com/jejunumileum.htmhttp://www.wesnorman.com/stomach.htmhttp://www.wesnorman.com/abdominalcavity.htmhttp://www.wesnorman.com/jejunumileum.htmhttp://www.wesnorman.com/stomach.htm
