GI ligaments Flashcards
falciform ligament: connects, structures contained. where was it derived from?
connects the LIVER and the ABDOMINAL WALL.
contains the ligamentum teres hepatis (from the fetal umbilical vein). derived from the ventral mesentery.
hepatoduodenal ligament: connects; structures contained
hepatoduodenal ligament connects the LIVER and the DUODENUM.
it contains the PORTAL TRIAD: proper hepatic artery, portal vein, and the common bile duct.
the proper hepatic artery comes from the the common hepatic artery (which splits into the proper hepatic and the gastroduodenal arteries). It supplies blood to the liver. the portal vein brings nutrient-rich (and potentially toxin-rich) from the intestine to the liver. The common bile duct joins the cystic and the common hepatic ducts.
What is the Pringle maneuver?
compression of the hepatoduodenal ligament btw the thumb and the index finger placed in the OMENTAL FORAMEN. meant to control bleeding
recall that the omental foramen is also called the epiploic foramen, and represents the passage btw the greater and lesser omentum.
gastrocolic ligament: connections and the structures contained
connects the greater curvature of the stomach and the transverse colon
contains the gastroepiploic arteries and is part of the greater omentum.
gastrohepatic ligament: connections and structures contained. clinical relevance
LIVER and LESSER CURVATURE of the stomach. contains the gastric arteries. this ligament separates the greater and lesser sacs on the right. it may be cut during surgery to access the lesser sac.
gastrosplenic ligament: connections, structures contained, clinical significance
connects the greater curvature and the spleen.
contains the short gastrics and the left gastroepiploic vessels. separates the greater and lesser sacs on the left
splenorenal ligament: connections and structures contained
connects the spleen and the posterior abdominal wall
contains the splenic artery and vein, and the tail of the pancreas
What are the layers of the gut wall, from inside to outside?
mucosa, submucosa, muscularis externa, and the serosa
functions and structures of the mucosal layer of the GI tract
contains the epithelium (absorption), the lamina propria (support), and the muscularis mucosa (motility functions)
functions and structures of the submucosa of the GI tract
submucosa: mostly support for the mucosa. also has submucosal nerve (Meissner’s) plexus, which controls secretions, and glands.
functions and structures of the muscularis externa in the GI tract
two layers of muscle with the myenteric (auerbach) nerve plexus sandwhiched in between:
inner circular layer, outer longitudinal layer.
Auerbach plexus controls motility.
what is the serosa and where is it located?
serosa is a support structrure seen in intraperitoneal structures. it is an adventitia in retroperitoneal structures.
What is the difference between an erosion and an ulcer?
erosion is confined to the mucosa. an ulcer may extend into the submucosa or the inner/outer muscular layers.
What is the normal histology of the esophagus
non-keratinized statified squamous epithelium
brunner glands: location, function, pathology
found in the duodenum. they secrete alkaline mucus to neutralize acid from the stomach. hypertrophy may be seen in peptic ulcer disease.