2.2 SMA, IMA and Targets Flashcards
SMA & SMV pass anterior to … and posterior to … of the pancreas
uncinate process and neck
The duodenum is mostly retroperitoneal except for what segment?
Superior
The descending segment of the duodenum contains what?
major duodenal papilla
Superior segment of duodenum anchored to liver via …
hepatoduodenal ligament
Ascending portion of duodenum anchored to diaphragm via… (helps regulate flow by changing tension)
suspensory ligament
Superior portion of duodenum has a smooth inner wall …., which receives chyme from stomach
duodenal cap (ampulla)
Rest of the internal wall of the duodenum has folds of mucosa called…
place circulares
The horizontal portion of the duodenum passes … to SMA and SMV.
posterior
Arterial supply to the pancreas (body and tail) via pancreatic aa. via …
splenic a.
Arterial supply (from celiac trunk) to the pancreas and duodenum via …
superior pancreaticoduodenal aa. (via gastroduodenal a. from common hepatic a.)
Arterial supply from SMA to the pancreas and duodenum via…
inferior pancreaticoduodenal a.
Venous drainage of most of the pancreas via…
pancreatic vv. from splenic v.
Venous drainage of head of pancreas and duodenum via.
pancreaticoduodenal vv. from SMV
Erosion of the wall of the Duodenum(ampulla) due to peptic ulcers leads to pancreatitis and GI bleed because of what structures?
gastroduodenal a. and pancreas
Lymph from pancreas and duodenum (foregut) drains into what nodes?
pyloric nodes -> celiac nodes -> cisterna chyli
Small intestine is anchored to the posterior wall by …
mesentery proper
Root of mesentery proper courses obliquely from … to …
cecum to distal (ascending segment) duodenum
Does the jejunum or the ileum have very tall place circulares?
jejunum (they increase surface area b/c absorbing more nut. here)
Which, the jejunum or the ileum, has fewer, larger arcades (~1 row)?
jejunum
Which, the jejunum or the ileum, has short vasa recta?
ileum
Which, the jejunum or the ileum, has longer vasa recta?
jejunum
Which, the jejunum or the ileum, has more numerous, smaller arcades?
ileum
Which, the jejunum or the ileum, has Peyer’s patches?
Ileum
What flexure is between ascending and transverse colon?
Hepatic flexure
What flexure is between transverse and descending colon?
Splenic flexure
Longitudinal muscles of colon wall condensed into three bands…, begin at root of appendix and merge into continuous muscular layer at rectum.
taenia coli
What gathers colon into pouches called haustra?
Plicae semilunares
Is the ascending colon retroperitoneal or intraperitoneal?
retroperitoneal - peritoneum only on anterior surface
What is in the appendix’s mesentery (mesoappendix)?
appendicular artery
The transverse colon is fused to the underside of the greater omentum, and attached to the wall by the …
transverse mesocolon (extends along inf. pancreas, and descending duodenum)
droplets of fatty mesentery project from the surface of colon (typically associated with taenia coli.
epiloic (omental) appendages
What branch off the SMA goes toward the transverse colon in the transverse mesocolon?
Middle colic a.
What branch off the SMA goes towards the ascending colon?
right colic a.
What branch off the SMA travels obliquely to the junction between the ileum and the colon?
Ileocolic a.
The middle, right and ileocolic arteries all supply … which parallels the colon and distributes blood to the organ through vasa recta?
marginal artery
lymphatics of small intestine are called …, they carry all dietary lipids, only route to bloodstream and liver.
lacteals
lymphatics from the midgut drain into … which continue to cisterna chyli
superior mesenteric nodes
What branch off the IMA goes towards the descending colon?
left colic a.
What branch off the IMA goes towards the sigmoid colon in the sigmoid mesocolon?
sigmoid arteries (2-3)
What branch off the IMA goes towards the top of the rectum?
superior rectal a.
What is the only intraperitoneal portion of the hindgut?
sigmoid
IMV drains into …
splenic v then into hepatic portal vein
