Download MBBS Anatomy PPT 48 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

Posteriorly

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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

Right colic flexure

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

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Loops of small intestine

Anteriorly

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Radix of mesentery

Superior mesenteric a. and v.

Posteriorly

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-Psoas major

Right ureter

Inferior vena cava

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Abdominal aorta ? testi art,

IMA

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Relationships of ascending part
Right

Head of pancreas and abdominal aorta

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Left

Left kidney and ureter

Ant.- Transverse colon

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& meso.,Lesser sac &

stomach

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Post.- Lt. sympathetic

chain,Lt. psoas

major,Lt.renal vessels,

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Lt. testicular vessels &

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

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Arteries

Superior

pancreaticoduodenal a.

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Inferior

pancreaticoduodenal a.

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1st Part- Rt. Gastric a.,

supraduodenal a. of

wilkie(hepatic a.)

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Veinsfollow arteries,

draining directly into

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superior mesenteric and

hepatic portal veins

Lymphatic Drainage-

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Pancreaticoduodenal nodes

Hepatic nodes

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

Nerve Supply-

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Sympathetic- T9 & T10

Parasympathetic-
Vagus- coeliac plexus-

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duodenum along its arteries.