Lower Abdomen Flashcards
What is the entrance to the stomach from the esophagus?
Cardiac oriface
What is the exit from the stomach to the duodenum?
The pyloric sphincter
What is the primary function of the stomach?
Enzymatic digestion
Describe the mobility of the duodenum?
Fixed and relatively immobile
Describe the mobility of the jejunum and ilium?
Tethered but very mobile
What is the combined length of the three parts of the small intestine?
20 ft
What are the permanent folds within the small intestine called?
Plicae circularis
Describe the concentration of the plicae circularis in the proximal and distal portions of the small intestine?
Become fewer or more diffuse as we move distally
What is the ileocecal junction?
Where the ilium empties into the cecum
What allows the small intestine to be more compact and fit into the abdomen?
Tonic contraction
What part of the duodenum is intra versus retraperitoneal?
The duodenal cap is retroperitoneal and the rest of the duodenum is intraperitoneal
What vertebral level is the superior part of the duodenum?
L1
What vertebral level is the descending part of the duodenum?
L2-L3
What vertebral level is the inferior part of the duodenum?
L3
What vertebral level is the ascending part of the duodenum?
L3-L2
As we move proximal to distal in the jejunum and ilium what happens to the vasa recta?
They decrease in length
As we move proximal to distal in the jejunum and ilium what happens to the plica circularis?
They decrease in number
As we move proximal to distal in the jejunum and ilium what happens to the arterial arcades?
They increase in length and number
As we move proximal to distal in the jejunum and ilium what happens to fat accumulation?
It increases
As we move proximal to distal in the jejunum and ilium what happens regarding lymphatics?
They increase
If the jejunum and ilium section of the small intestine were divided into fifths, how long is each component?
Jejunum is proximal 2/5 and ilium is distal 3/5
Using the quadrant abdominal division, where are the jejunum and ilium located?
Jejunum is upper left and ilium is lower right
What is Meckel’s (ileal) diverticulum?
Remnant of the embryonic yolk sac
Where would Meckel’s diverticulum be found?
1 m proximal to ilieocecal valve
How many parts are there in the large intestine?
5 segments and 2 flexures
What are the 5 segments of the large intestine?
Cecum, ascending, transverse, descending, sigmoid
What are the two flexures of the large intestine called?
Right colic (hepatic), and left colic (splenic) flexures
How is the left colic flexure attached?
This part of the large intestine is attached to the diaphragm via splenocolic flexure
What are the right and left paracolic gutters?
These are depressions that are lateral to the ascending and descending segments of the large intestine, through which materials pass from one region of the peritoneal cavity to another