Flashcards in Blood and Nerve supply to abdominal organs Deck (43):
what forms the aortic hiatus?
the left and right crura of the diaphragm
is the aorta intra or retroperitoneal?
What vertebral level does the aorta bifurcate at?
-splits into left and right common iliac arteries
What big vein crosses the aorta anteriorly?
the left renal v.
What is an abdominal aortic aneurysm?
dilation of the aorta
-primarily due to atherosclerosis
-presents as pulsatile abdominal mass that grows w/ time
-aorta should never be larger than 3 cm
Where do we see the celiac trunk come off?
immediately inferior to the aortic hiatus at T12-L1
What are the 3 major branches of the celiac trunk?
-left gastric a
-common hepatic a.
What surrounds the base of the celiac trunk?
the celiac plexus and ganglion
What do the branches of the celiac trunk supply?
derivatives of the foregut and the spleen
-remember that the spleen is not part of the the digestive tube
What are the branches off of the left gastric a.
-L gastric anastamoses with the right gastric along the lesser curvature of the stomach
What are the branches of the splenic A.
short gastric, left gastroomental, and pancreatic branches (split into dorsal and inferior branches
What ligament is the splenic A. in?
the splenorenal L.
What ligament is the short gastric a. in?
the gastrosplenic L.
*okay, this one makes sense because this is a branch off of the SPLENIC artery and it is going to the STOMACH*
What are the 2 main arteries that the common hepatic a. branches into?
proper hepatic and gastroduodenal
What does the proper hepatic A. branch into?
-right gastric a. (anastamoses with left gastrci on the lesser curvature)
-right and left hepatic A.'s (cystic a. comes off of right)
What does the gastroduodenal a. branch into?
right gastroomental and superior pancreaticoduodenal
-may give off supraduodenal a.
If the abdominal aorta is blocked between the celiac trunk and the SMA, what will be the vessels compensating for that?
SPDA and IPDA
What two vessels come together to form the portal vein?
the splenic v and SMV
-splenic or IMV?
What drains the liver itself?
the hepatic veins
-not the portal vein
What surrounds the structures of the portal triad?
-the other part of the lesser omentum is the hepatogastric ligament
What branch of the aorta is located posterior tot he hepatogastric L. within the lesser peritoneal sac?
the celiac trunk
What is the typical arrangement of the portal triad?
portal vein is posterior, proper hepatic on the left, and bile duct on the right
Cholecystectomy, what is it?
a dissection through the hepatoduodenal ligament to reach the cystic A. which must be ligated before removing the gall bladder
What is the main route of lymphatic drainage for the gallbladder?
What is a branch from the SMA that supplies the pancreas?
the inferior pancreatico duodenal a
-branches into anterior and posterior and anastamoses with the branches from the gastroduodenal a.
-makes vascular arcades on the anterior and posterior of the HEAD of the pancreas
Where does the SMA emerge from the aorta?
posterior to the neck of the pancreas to the left of the SMV
What does the SMA enter in order to get to the the ileum and jejunum?
What are the branches of the SMA to the small intestine?
jejunal and ileal a.'s
-remember that the jejunum is more well vascularized
What are the branches of the SMA to the large intestine?
Right colic A.
middle colic A.
marginal A. kind of goes all the way around everything
What are the branches of the ileocolic a.
ant and post cecal branches
Where is the SMV and how does it run?
on the right and parallel with the SMA
-drains all of the same parts that are supplied by the SMA
-joins splenic V to form the portal vein posterior to the neck of the pancreas
What the the SMA generally supply?
derivatives of the midgut
What does the IMA generally supply?
derivatives of the hind gut
What are the branches of the IMA
Left colic A. (ascending and desceding)
superior rectal A.
What does the IMV drain?
the exact same things that the IMA supplies
*But, branches of the IMV do not parallel the IMA*
What does the IMV form to make the portal vein?
either the splenic V. or the SMV
Where doe superior rectal veins drain to?
Where doe middle rectal veins drain to ?
internal iliac V.'s
Where do inferior rectal veins drain to?
the internal pudendal V.'s
What provides parasympathetic innervation to the foregut to midgut
the vagus nerve
What provides parasympathetic innervation to the hind gut?
Pelvic splanchnic N.'s
In the enteric nervous system, where is the myenteric plexus located?
between the outer longitudinal and inner circular muscular layers