Blood and Nerve supply to abdominal organs Flashcards Preview

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Flashcards in Blood and Nerve supply to abdominal organs Deck (43):
1

what forms the aortic hiatus?

the left and right crura of the diaphragm

2

is the aorta intra or retroperitoneal?

retro

3

What vertebral level does the aorta bifurcate at?

L4
-splits into left and right common iliac arteries

4

What big vein crosses the aorta anteriorly?

the left renal v.

5

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

6

Where do we see the celiac trunk come off?

immediately inferior to the aortic hiatus at T12-L1

7

What are the 3 major branches of the celiac trunk?

-left gastric a
-common hepatic a.
-splenic a.

8

What surrounds the base of the celiac trunk?

the celiac plexus and ganglion

9

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

10

What are the branches off of the left gastric a.

-esohageal branches
-L gastric anastamoses with the right gastric along the lesser curvature of the stomach

11

What are the branches of the splenic A.

short gastric, left gastroomental, and pancreatic branches (split into dorsal and inferior branches

12

What ligament is the splenic A. in?

the splenorenal L.

13

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*

14

What are the 2 main arteries that the common hepatic a. branches into?

proper hepatic and gastroduodenal

15

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)

16

What does the gastroduodenal a. branch into?

right gastroomental and superior pancreaticoduodenal
-may give off supraduodenal a.

17

If the abdominal aorta is blocked between the celiac trunk and the SMA, what will be the vessels compensating for that?

SPDA and IPDA

18

What two vessels come together to form the portal vein?

the splenic v and SMV
-splenic or IMV?

19

What drains the liver itself?

the hepatic veins
-not the portal vein

20

What surrounds the structures of the portal triad?

hepatoduodenal ligament
-the other part of the lesser omentum is the hepatogastric ligament

21

What branch of the aorta is located posterior tot he hepatogastric L. within the lesser peritoneal sac?

the celiac trunk

22

What is the typical arrangement of the portal triad?

portal vein is posterior, proper hepatic on the left, and bile duct on the right

23

Cholecystectomy, what is it?

a dissection through the hepatoduodenal ligament to reach the cystic A. which must be ligated before removing the gall bladder

24

What is the main route of lymphatic drainage for the gallbladder?

calot's node

25

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

26

Where does the SMA emerge from the aorta?

posterior to the neck of the pancreas to the left of the SMV

27

What does the SMA enter in order to get to the the ileum and jejunum?

THE mesentery

28

What are the branches of the SMA to the small intestine?

jejunal and ileal a.'s
-remember that the jejunum is more well vascularized

29

What are the branches of the SMA to the large intestine?

Ileocolic A.
Right colic A.
middle colic A.
marginal A. kind of goes all the way around everything

30

What are the branches of the ileocolic a.

ileal branch
colic branch
ant and post cecal branches
appendicular branch

31

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

32

What the the SMA generally supply?

derivatives of the midgut

33

What does the IMA generally supply?

derivatives of the hind gut

34

What are the branches of the IMA

Left colic A. (ascending and desceding)
sigmoid A's
superior rectal A.
marginal A.

35

What does the IMV drain?

the exact same things that the IMA supplies
*But, branches of the IMV do not parallel the IMA*

36

What does the IMV form to make the portal vein?

either the splenic V. or the SMV

37

Where doe superior rectal veins drain to?

the IMV

38

Where doe middle rectal veins drain to ?

internal iliac V.'s

39

Where do inferior rectal veins drain to?

the internal pudendal V.'s

40

What provides parasympathetic innervation to the foregut to midgut

the vagus nerve

41

What provides parasympathetic innervation to the hind gut?

Pelvic splanchnic N.'s

42

In the enteric nervous system, where is the myenteric plexus located?

between the outer longitudinal and inner circular muscular layers
-controls motility

43

Where is the submucosal (meissner's) plexus?

it's the one that's more superficial
-controls secretions, blood flow, and absorption