Duodenum - lecture video Flashcards
what is the embryonic origin of the duodenum?
foregut and midgut
what does the duodenum form?
1st part of the small intestines
where does the duodenum run?
from pylorus of stomach to jejunum
how long and how many sections does the duodenum contain?
about 25cm and divided into 4 sections
what is the 1st section of the duodenum?
5cm - duodenal bulb
what is common in the first section of the duodenum?
common for peptic ulcer
acidic chyme from stomach (antrum - gastrin)
what type of organ is the duodenum?
only 1st part is intraperitoneum (the part involved in lesser omentum)
what is the foregut portion of the duodenum supplied by? what is it a branch of?
superior pancreaticoduodenal artery - branch of gastroduodenal artery (from common hepatic, coeliac trunk)
what is the midgut portion of the duodenum supplied by? what is it a branch of?
inferior pancreaticoduodenal artery - 1st branch of SMA
what type of organ are sections 2-4 of the duodenum? what does this mean?
retroperitoneum, only anterior surface in contact with the peritoneum
where is the junction between midgut & foregut of the duodenum?
halfway through the 2nd duodenum
where is the major pancreatic duct of the duodenum? function?
through major duodenal papillae & ampulla of vater (dilation)
(bile entry from pancreas into duodenum)
what does the 4th part of the duodenum contain?
suspensory ligament
where does the suspensory ligament attach?
attaches the 4th part of duodenum to the diaphragm
nears where oesophagus enters abdo cavity
attaches to duodenum near duodenojejunal flexure
passes behind pancreas
what happens when the suspensory ligament contract?
it widens the angle at the duodenojejunal flexure - can facilitate movement of intestinal contents
