Flashcards in Peritoneum, peritoneal cavity, and mesenteries Deck (42):
What are the organs of the forgegut?
stomach, liver, gallbladder, pancreas, spleen, up tot he 1st half of the duodenum
What are the organs of the midgut
2nd half of duodenyum to the 2/3 of transverse colon
Organs of the hindgut
distal 1/3 of transverse colon to the rectum
What are the blood main supplies to the foregut, mid, and hindgut?
Celiac trunk, SMA, and IMA
What makes up the ventral mesentery for the foregut?
Lesser omentum, falciform L., coronary triangular L.'s
What makes up the dorsal mesenter for the foregut?
Gastroplenic, splenorenal, and gastrocolic L.'s, greater omentum
dorsal mesentery for the midgut
mesointestine, mesoappendix, transverse mesocolon
dorsal mesentery for the hindgut
What are the motor nerve supplies for each section of the GI tract (fore, mid, and hindgut)
Vagus, Vagus, Pelvic splanchnic N.
Which layer of peritoneum has pain fibers?
the parietal layer
What supplies blood to visceral peritoneum?
the same thing as whatever organ it is covering
What does intraperitoneal even mean?
it's covered on most sides by VISCERAL peritoneum
-suspended by mesentery from the body wall
What does retroperitoneal mean?
it's covered by parietal peritoneum on one side only
What are some primary retroperitoneal organs?
kidneys, ureters, adrenals, gonads, aorta, and IVC
secondary retroperitoneal organs
duodenum, pancreas, ascending and descending colon
What is the significance of THE mesentery?
it attaches the free small intestine to the posterior body wall
What does the omentum do in general?
attaches stomach to other things
which omentum contains the portal triad?
the lesser omentum
where does the lesser omentum develop from?
what are the 2 parts of the lesser omentum?
hepatogastric L. and hepatoduodenal L.
-remember that THERE ARE NERVES HERE!
Where does the greater omentum develop from?
What are the 3 parts of the greater omentum?
gastrocolic, gastrophrenic, and gastrosplenic L.
What are the peritoneal ligaments
-associated with the liver
-coronary R. and Left triangular L.'s, Falciform ligament (with ligamentum teres hepatis on the end of it)
What are the superior and inferior duodenal folds formed by?
the inferior mesenteric vein posterior to peritoneum
What makes the median umbilical fold?
urachus, it's midline
What makes the medial umbilical fold?
medial umbilical ligaments
-obliterated umbilical a.
What makes the lateral umbilical fold?
inferior epigastric vessels (A. and V.)
-remember that this is what we use to determine whether and inguinal hernia is direct or indirect!
What is the falciform ligament?
a curved remnant of the ventral mesogastrium
-the ligamentum teres hepatis (round ligament of the liver) is in its lower free border
Where do we find the supravesical fossa?
between the median and medial umbilical folds
-site for rare supravesical hernias
Where is the medial inguinal fossa?
between the medial and lateral umbilical folds
-site for direct inguinal hernias
Where is the lateral inguinal fossa?
lateral to the LATERAL umbilical folds
-site for indirect inguinal hernias
What is the peritoneal cavity?
a closed potential space b/w parietal and visceral layers of peritoneum
*clinically important because abscesses amy develop and excess fluid (ascites) will pool here
What is the greater sac of the peritoneal cavity divided into and what divides it
supracolic and infracolic regions
-colon and transverse mesocolon does the dividing
What are the 2 spaces in the inframesocolic region and what divides it?
divided my THE mesentery into right and elft infracolic spaces
where will intraperitoneal infection want to spread?
the inframesocolic region
within the inframesocolic region, what stops fluid from spreading superiorly?
the phrenicocolic ligament
through what structure do the great and lesser sacs communicate?
the epiploic foramen (of winslow)
what is anterior to the foramen of winslow?
the hepatoduodenal L.
What important thing dot he hepatoduodenal L. contain?
the portal triad
What is posterior to the foramen of winslow?
IVC and the diaphragm
What is superior to the foramen of winslow?
liver, the (caudate lobe)