Jejunum And Ileum Flashcards
Where jejunum begins
Duodenojejunal flexure
This is where the digestive tract resumes intraperitoneal course
Duodenojejunal flexure
Where ileum ends and is the union of terminal ileum and the cecum
Ileo cecal junction
How long is jejunum and ileum
6-7m
2/5 jejunum
3/5 ileum
Mostly lie in the LUQ of the infracolic compartment
Jejunum
Ileum - RLQ
Thicker walls
Larger in diameter
More vascular
Large and well developed circular folds
Jejunum
Where you can find Peyer’s patches
Ileum
Most common site of Meckel’s diverticulum
Ileum
Layer of peritoneum which encloses an organ and connects it to abdominal wall
Mesentery
Fan-shaped fold of peritoneum that attaches jejunum and ileum to posterior abdominal wall
Mesentery
Most mobile parts of the intestine
Transverse colon
Small intestine
Mesentery that has less fat and prominent arterial arcades
Mesentery of jejunum
Arterial supply of jejunum and ileum
SMA
Branches: jejunal and ileal a
Arteries unite and are called
Arterial arcades
Arterial arcades give rise to straight arteries called
Vasa recta
Have longer arterial arcades
Jejunum
Drains jejunum and ileum
SMV
SMV unites with splenic vein to form
Hepatic portal v
SMV unites with what to form portal v
Splenic v
Specialized LV in intestinal villi that absorbs fat
Lacteals
Within the mesentery, lymph passes to what lymph nodes
Juxtaintestinal
Mesenteric
Superior central
LN close to intestinal wall
Juxtaintestinal
LN scattered among arterial arcades
Mesenteric
LN located along the proximal part of SMA
Superior central nodes
Mesenteric lymph nodes drains to
SM LN
Parasympathetic innervation of jejunum and ileum comes from
Posterior vagal trunk
Increase motility and secretion
Vasodilation
- effects of what kind of nervous stimulation
Parasympathetic
SMA and its branches are surrounded by _____________ through which nerves are conducted to the parts supplies by this artery
Periatrial nerve plexus
Sympathetic innervation of small intestine comes from
SM ganglion
Parasympathetic presynaptic fibers synapse with postsynaptic fibers where
Myenteric & submucosal plexus
SYMPATHETIC presynaptic fibers synapse with postsynaptic fibers where
Celiac and SM ganglia
Part of the intestine that has a feathery image
Jejunum
Has long vasa recta
Jejunum
Has many arterial arcades
Ileum
Most common malformation of GIT Finger-like pouch Remnant of embryonic yolk stalk From anti-mesenteric border May mimic acute appendicitis
Meckel’s diverticulum
> 50% of bowel is resected
STEP ( serial transverse enteroplasty procedure)
Short bowel syndrome
