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Gross anatomy of the jejunum , including blood and nerve supply, venous and lymphatic drainage.

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imam univarsity , college of medicine .
imam univarsity , college of medicine .

Topic objectives: Overview of Jejunum Gross Anatomy of the Jejunum . Blood Supply . Venous Drainage . Nerve Supply . lymphatic drainage . Relations of Jejunum . Location of Jejunum . MCQ Summary .

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{ Gross Anatomy of the Jejunum including blood and nerve supply, venous and lymphatic drainage.
1 ‫شديد‬ ‫رفيق‬ ‫بن‬ ‫مصطفى‬ ‫بن‬ ‫عاصم‬ 435032467 2 ‫الدايل‬ ‫عبدالرحمن‬ ‫بن‬ ‫يوسف‬ ‫بن‬ ‫عبدالرحمن‬ 435031641 3 ‫الغامدي‬ ‫لوفه‬ ‫آل‬ ‫عبدهللا‬ ‫بن‬ ‫سعود‬ ‫بن‬ ‫عبدهللا‬ 435031674 4 ‫العتيبي‬ ‫الغبيوي‬ ‫تركي‬ ‫بن‬ ‫بندر‬ ‫بن‬ ‫فراس‬ 435031634 5 ‫الشريف‬ ‫الحامد‬ ‫عبدهللا‬ ‫بن‬ ‫غالب‬ ‫بن‬ ‫فهد‬ 435032389 6 ‫المطيري‬ ‫الصيعري‬ ‫عائض‬ ‫بن‬ ‫عيد‬ ‫بن‬ ‫فيصل‬ 435031637 7 ‫الحربي‬ ‫أحمد‬ ‫بن‬ ‫موسى‬ ‫بن‬ ‫متعب‬ 435032375 8 ‫الحارثي‬ ‫الهميلي‬ ‫عبدهللا‬ ‫بن‬ ‫عيضه‬ ‫بن‬ ‫محمد‬ 435032399 9 ‫الحربي‬ ‫مشعل‬ ‫عبدالرحمن‬ 435031643 Teamwork :
 Overview of Jejunum  Gross Anatomy of the Jejunum .  Blood Supply .  Venous Drainage .  Nerve Supply .  lymphatic drainage .  Relations of Jejunum .  Location of Jejunum .  MCQ  In Summary . Topic objectives:
• The jejunum is the second part of the small intestine . • It is connecting the duodenum to the ileum , it is about 8 ft (2.4 m). • The jejunum begins at the duodenojejunal flexure. Overview of Jejunum
 The jejunum lies coiled in the upper part of the peritoneal cavity below the left side of the transverse mesocolon.  It is wider bored, thicker walled, redder and more vascular than the ileum.  The jejunal wall feels thicker because the permanent infoldings of the mucous membrane.
Gross Anatomy of the Jejunum . • Macroscopic anatomy : • The jejunum is the middle of the three parts of the small intestine. • The transition from the extraperitoneal ascending part of the duodenum to the intraperitoneal jejunum occurs at the duodenojejunal flexure (at the height of L2). • The transition to the ileum is not sharply marked and only visible microscopically. • Like all intraperitoneal organs both the jejunum and ileum are attached to the posterior wall of the abdomen by the mesentery.
Jejunum ▪ Most absorption of nutrients occurs here ▪ Chemical digestion occurs here ▪ Long finger shaped villi ▪ Thick walled and wide lumen
Blood Supply • Arteries: The arterial supply is from branches of the superior mesenteric artery .
Venous Drainage of Jejunum • Venous drainage of jejunum is by superior mesenteric vein. • The superior mesenteric vein reach to the point it unites with the splenic vein and form the Portal vein(hepatic portal vein). • The superior mesenteric vein go with (accompanies) the superior mesenteric artery to it’s right and anterior of the superior mesenteric vein.
Gross anatomy of the jejunum , including blood and nerve supply, venous and lymphatic drainage.
Nerve Supply of jejunum • Nerve Supply of jejunum derived from : • sympathetic and parasympathetic nerves . • The sympathetic innervation is carried by the nerves of superior mesenteric plexus, the parasympathetic innervation by the vagus nerve (cranial nerve X).
Gross anatomy of the jejunum , including blood and nerve supply, venous and lymphatic drainage.
lymphatic drainage • Lymphatic vessels of the jejunum pass into mesenteric nodes via the lacteals of the villi. • They do not reach the superior mesenteric nodes, which the blood vessels follow. • All the efferents pass into the intestinal lymph trunks, which then enter the cisterna chyli or the abdominal confluence of lymph trunks. • The cisterna chyli drains into the thoracic duct.
mesenteric nodes
Gross anatomy of the jejunum , including blood and nerve supply, venous and lymphatic drainage.
Relations of jejunum  The jejunum begins at the duodenojejunal flexure at the level of second lumbar vertebra.  the duodenojejunal flexure is located on left of the aorta.
Location of Jejunum  Most of the jejunum Lies in the upper part of the abdominal cavity and to the left of the midline.  The coils of jejunum is attached to the posterior abdominal wall by a fan-shaped fold of peritoneum known as the mesentery of the small intestine.
Gross anatomy of the jejunum , including blood and nerve supply, venous and lymphatic drainage.
MCQs 1- Venous drainage of jejunum is drawn by : a- superior mesenteric artery b- inferior mesenteric artery c- superior mesenteric vein d- inferior mesenteric vein 2- At what level does the jejunum begin : a .Thoracic XII. b .Lumber III. . c .Lumber II. d .Sacrum. 3- Lymphatic vessels within the bowel villi, which carry the lipids to the circulatory system, are known as: a. vessels. b. ductules. c. canaliculi. d. lacteals.
 The jejunum makes up about it is 8 ft ((2.4 m)).  The arterial supply is from branches of the superior mesenteric artery .  Veins drain into superior mesenteric vein  The sympathetic innervation is carried by the nerves of superior mesenteric plexus, the parasympathetic innervation by the vagus nerve (cranial nerve X).  Lymph vessels pass through many intermediate mesenteric nodes & finally reach superior mesenteric nodes (situated around origin of mesenteric artery) In Summary
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Gross anatomy of the jejunum , including blood and nerve supply, venous and lymphatic drainage.

  • 1. { Gross Anatomy of the Jejunum including blood and nerve supply, venous and lymphatic drainage.
  • 2. 1 ‫شديد‬ ‫رفيق‬ ‫بن‬ ‫مصطفى‬ ‫بن‬ ‫عاصم‬ 435032467 2 ‫الدايل‬ ‫عبدالرحمن‬ ‫بن‬ ‫يوسف‬ ‫بن‬ ‫عبدالرحمن‬ 435031641 3 ‫الغامدي‬ ‫لوفه‬ ‫آل‬ ‫عبدهللا‬ ‫بن‬ ‫سعود‬ ‫بن‬ ‫عبدهللا‬ 435031674 4 ‫العتيبي‬ ‫الغبيوي‬ ‫تركي‬ ‫بن‬ ‫بندر‬ ‫بن‬ ‫فراس‬ 435031634 5 ‫الشريف‬ ‫الحامد‬ ‫عبدهللا‬ ‫بن‬ ‫غالب‬ ‫بن‬ ‫فهد‬ 435032389 6 ‫المطيري‬ ‫الصيعري‬ ‫عائض‬ ‫بن‬ ‫عيد‬ ‫بن‬ ‫فيصل‬ 435031637 7 ‫الحربي‬ ‫أحمد‬ ‫بن‬ ‫موسى‬ ‫بن‬ ‫متعب‬ 435032375 8 ‫الحارثي‬ ‫الهميلي‬ ‫عبدهللا‬ ‫بن‬ ‫عيضه‬ ‫بن‬ ‫محمد‬ 435032399 9 ‫الحربي‬ ‫مشعل‬ ‫عبدالرحمن‬ 435031643 Teamwork :
  • 3.  Overview of Jejunum  Gross Anatomy of the Jejunum .  Blood Supply .  Venous Drainage .  Nerve Supply .  lymphatic drainage .  Relations of Jejunum .  Location of Jejunum .  MCQ  In Summary . Topic objectives:
  • 4. • The jejunum is the second part of the small intestine . • It is connecting the duodenum to the ileum , it is about 8 ft (2.4 m). • The jejunum begins at the duodenojejunal flexure. Overview of Jejunum
  • 5.  The jejunum lies coiled in the upper part of the peritoneal cavity below the left side of the transverse mesocolon.  It is wider bored, thicker walled, redder and more vascular than the ileum.  The jejunal wall feels thicker because the permanent infoldings of the mucous membrane.
  • 6. Gross Anatomy of the Jejunum . • Macroscopic anatomy : • The jejunum is the middle of the three parts of the small intestine. • The transition from the extraperitoneal ascending part of the duodenum to the intraperitoneal jejunum occurs at the duodenojejunal flexure (at the height of L2). • The transition to the ileum is not sharply marked and only visible microscopically. • Like all intraperitoneal organs both the jejunum and ileum are attached to the posterior wall of the abdomen by the mesentery.
  • 7. Jejunum ▪ Most absorption of nutrients occurs here ▪ Chemical digestion occurs here ▪ Long finger shaped villi ▪ Thick walled and wide lumen
  • 8. Blood Supply • Arteries: The arterial supply is from branches of the superior mesenteric artery .
  • 9. Venous Drainage of Jejunum • Venous drainage of jejunum is by superior mesenteric vein. • The superior mesenteric vein reach to the point it unites with the splenic vein and form the Portal vein(hepatic portal vein). • The superior mesenteric vein go with (accompanies) the superior mesenteric artery to it’s right and anterior of the superior mesenteric vein.
  • 11. Nerve Supply of jejunum • Nerve Supply of jejunum derived from : • sympathetic and parasympathetic nerves . • The sympathetic innervation is carried by the nerves of superior mesenteric plexus, the parasympathetic innervation by the vagus nerve (cranial nerve X).
  • 13. lymphatic drainage • Lymphatic vessels of the jejunum pass into mesenteric nodes via the lacteals of the villi. • They do not reach the superior mesenteric nodes, which the blood vessels follow. • All the efferents pass into the intestinal lymph trunks, which then enter the cisterna chyli or the abdominal confluence of lymph trunks. • The cisterna chyli drains into the thoracic duct.
  • 16. Relations of jejunum  The jejunum begins at the duodenojejunal flexure at the level of second lumbar vertebra.  the duodenojejunal flexure is located on left of the aorta.
  • 17. Location of Jejunum  Most of the jejunum Lies in the upper part of the abdominal cavity and to the left of the midline.  The coils of jejunum is attached to the posterior abdominal wall by a fan-shaped fold of peritoneum known as the mesentery of the small intestine.
  • 19. MCQs 1- Venous drainage of jejunum is drawn by : a- superior mesenteric artery b- inferior mesenteric artery c- superior mesenteric vein d- inferior mesenteric vein 2- At what level does the jejunum begin : a .Thoracic XII. b .Lumber III. . c .Lumber II. d .Sacrum. 3- Lymphatic vessels within the bowel villi, which carry the lipids to the circulatory system, are known as: a. vessels. b. ductules. c. canaliculi. d. lacteals.
  • 20.  The jejunum makes up about it is 8 ft ((2.4 m)).  The arterial supply is from branches of the superior mesenteric artery .  Veins drain into superior mesenteric vein  The sympathetic innervation is carried by the nerves of superior mesenteric plexus, the parasympathetic innervation by the vagus nerve (cranial nerve X).  Lymph vessels pass through many intermediate mesenteric nodes & finally reach superior mesenteric nodes (situated around origin of mesenteric artery) In Summary