Nep

1. Peritoneal cavity
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2. • Is a secondary retroperitoneal organ except
its tail that lies behind the lesser sac
• It is a soft, pinkish, lobulated & elongated
organ / gland that is partly exocrine &
partly endocrine.
• Exocrine part secretes digestive pancreatic
enzymes, & endocrine part secretes
hormones e.g. Insulin and glucagon
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3. It is a mixed gland
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4. • It lies more or less transversely over the
posterior abdominal wall extending
between the concavity of the duodenum and
the hilus of the spleen
It has:
• a length of ~15-
20cms ,
• a breadth of ~3cm,
• a thickness of ~2cm
&
• It weighs ~60-
100gms
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5. Parts of pancreas
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6. Parts of the pancreas
1. Head (caput),
2. Body (corpus) and
3. Tail (caudal)
• The junction area between the head
and body is known as the neck, behind
which the superior mesenteric vein
opens into the portal vein.
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7. 7

8. 8

9. Tail- projects into the splenorenal ligament
where it lies intraperitoneally being in contact
with or within 1cm of the hilus of spleen.
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10. Pancreatic duct
• The pancreatic duct begins in the tail and runs
nearer to the posterior surface of the gland.
• In the head it unites with the bile duct to form
a dilated part called ampulla of Vater.
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11. 11

12. 12

13. Vessels of the pancreas
A. Arteries
• Head - Supraduodenal artery from the common
hepatic artery
- Pancreatic branch of the superior & inferior
pancreaticoduodenal artery from
gastroduodenal artery & the superior
mesenteric artery respectively.
-The last two unite and form an arcade between
the head and the concavity of the duodenum.
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14. Body
1.Dorsal pancreatic artery from splenic
artery
2. Inferior pancreatic artery from
superior mesenteric artery.
Tail
Arteria Pancreatica magna (greater
pancreatic) artery from splenic artery.
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15. B. Veins
 Pancreatic veins drain via the
splenic, right gastroepiploic and
superior or inferior
pancreaticoduodenal veins that
drain into the portal vein and
superior mesenteric vein
respectively.
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16. 18

17. C. Lymphatics
• The lymphatic vessels from the pancreas
drain into the adjacent lymph nodes like
the splenic, mesenteric, gastric, hepatic
and celiac group of lymph nodes.
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19. D. Innervation of the pancreas
• Innervated by fibres from the superior
mesenteric and celiac plexuses that form a
secondary pancreatic plexus.
• Vagal stimulation induces enzymatic secretion
and possibly insulin release and sympathetic
stimulation decreases the fluid and HCO3-
content of the secretion & is vasomotor.
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