The duodenum is divided into four parts, with each part having specific anterior, posterior, superior, and inferior relations within the abdomen. It has branches of the celiac artery and superior mesenteric artery for blood supply and drains into the portal vein. Lymphatic drainage is to the pancreaticoduodenal, pyloric, and superior mesenteric lymph nodes. The duodenum has relevance for conditions like pancreatitis due to its close anatomical relationship with other organs like the pancreas and blood vessels.

1. DUODENUM

2. DUODENUM
• Derived from latin word Do-deka-dactulos
• Meaning – the length of the duodenum is equal
to the breath of twelve fingers.
• First used by herophilus 300 B.C.

5. PARTS
1st part
2nd part
3rd part
4th part

6. FIRST PART OF DUODENUM

7. ANTERIOR RELATION OF FIRST PART

9. POSTERIOR RELATION OF FIRST PART

10. SUPERIOR AND INFERIOR RELATIONS

11. SECOND PART OF THE DUODENUM

12. ANTERIOR RELATIONS

13. POSTERIOR RELATIONS

14. MEDIAL AND LATERAL RELATIONS OF 2ND PART

15. INTERIOR OF THE SECOND PART OF DUODENUM

16. INTERIOR OF 2ND PART

19. THIRD PART OF THE DUODENUM

20. ANTERIOR RELATIONS

21. POSTERIOR RELATIONS

22. SUPERIOR & INFERIOR RELATIONS

23. FOURTH PART OF DUODENUM

24. ANTERIOR RELATIONS

26. POSTERIOR RELATION

27. MEDIAL & LATERAL AND SUPERIOR RELATION

28. Duodenal Recesses
They are 4 small pocketlike pouches of
peritoneum close to the duodenojejunal
junction.
They are superior ; inferior ; paraduodenal
( lateral to 4th part) and retroduodenal
recesses ( behind 4th part). The 3rd lies
behind a vascular fold containing inferior
mesenteric vein and the ascending branch of
the left colic artery in its free margin.

29. ARTERIAL SUPPLY

32. VENOUS DRAINAGE

33. LYMPHATIC DRAINAGE

34. NERVE SUPPLY

35. APPLIED ANATOMY
• ANNULAR TYPE OF HEAD OF THE PANCREAS