Download MBBS Anatomy PPT 64 Duodenum Notes

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Shortest,widest & most fixed part of S.I.

Extends- pylorus to duodenojejunal flexure

C shape, Level of umblicus- L1,2,3.

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25 cm long- 5, 7.5, 10, & 2.5 cm.

Mostly retroperitoneal & fixed.

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Relationships of superior part
Anteriorly

Quadrate lobe of liver
Gallbladder

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Posteriorly

Commom bile duct
Gastroduodenal a.

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Portal v.

Superioely

Omental foramen

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Hepati Art

Inferiorly

Head & Neck of pancreas

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Relationships of descending

part

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Anteriorly

Liver, Gall bladder
Transverse colon and

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mesocolon

Loops of small intestine

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Posteriorly

Right renal, hilum and ureter
Right renal vessels
IVC , Psoas major

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Medially

Head of pancreas
Common bile duct and

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pancreatic duct

Laterally

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Right colic flexure

Relationships of horizontal part
Superiorly
-Head of pancreas, Uncinate pr

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Inferiorly

Loops of small intestine

Anteriorly

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Radix of mesentery

Superior mesenteric a. and v.

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Posteriorly
-Psoas major

Right ureter

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Inferior vena cava

Abdominal aorta ? testi art,

IMA

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Relationships of ascending part
Right

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Head of pancreas and abdominal aorta

Left

Left kidney and ureter

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Ant.- Transverse colon

& meso.,Lesser sac &

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stomach

Post.- Lt. sympathetic

chain,Lt. psoas

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major,Lt.renal vessels,

Lt. testicular vessels &

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I.M.V.

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Fibromuscular band

which suspends &

supports the

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duodenojejunal flexure.

Arises from Rt. Crus of

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the diaphragm- DJ

Flexure & 3rd ? 4th part

of duodenum.

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Blood supply
Arteries

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Superior

pancreaticoduodenal a.

Inferior

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pancreaticoduodenal a.

1st Part- Rt. Gastric a.,

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supraduodenal a. of

wilkie(hepatic a.)

Veinsfollow arteries,

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draining directly into

superior mesenteric and

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hepatic portal veins

Lymphatic Drainage-

Pancreaticoduodenal nodes

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Hepatic nodes

Coeliac n. & Sup. Mes. N
int. lymph trunk

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Cisterna chyli


Nerve Supply-

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Sympathetic- T9 & T10

Parasympathetic-
Vagus- coeliac plexus-
duodenum along its arteries.

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