6 Blood Supply to Abdominal Organs

Question 1

What are the unpaired branches off the abdominal aorta

Answer 1

Celiac A (T12)
Superior mesenteric A (L1)
Inferior mesenteric A (L3)

Question 2

What does the celiac trunk supply

Answer 2

Foregut derivatives

Question 3

What are the foregut derivatives

Answer 3

Liver and bile ducts
Distal esophagus
Stomach
Duodenum - proximal to common bile duct
Pancreas

Question 4

What does the SMA supply

Answer 4

Midgut derivatives

Question 5

What are the midgut derivatives

Answer 5

Duodenum - distal to common bile duct
Jejunum
Ileum
Cecum
Appendix
Ascending colon
Transverse colon - proximal 2/3

Question 6

What does the IMA supply

Answer 6

Hindgut derivatives

Question 7

What are the hindgut derivatives

Answer 7

Transverse colon - distal 1/3
Descending colon
Sigmoid colon
Rectum - proximal 1/3

Question 8

What level does the abdominal aorta bifurcate

Answer 8

L4

Question 9

What are the branches off the celiac trunk

Answer 9

Left gastric A
Splenic A
Common hepatic A

Question 10

What does the L gastric A supply

Answer 10

Distal esophagus and lesser curvature of the stomach

Question 11

What does the splenic A supply

Answer 11

Spleen

Question 12

What are the branches off the splenic A

Answer 12

Short gastric A

L gastroepicloic A

Question 13

What does the short gastric A supply

Answer 13

Fundus

Question 14

What ligaments is associated with the splenic A

Answer 14

Splenorenal L

Question 15

What ligament is associated with the short gastric A

Answer 15

Gastrosplenic L

Question 16

What does the L gastroepicloic A supply

Answer 16

Greater omentum and greater curvature of the stomach

Question 17

What does the common hepatic A branch into

Answer 17

Proper hepatic A and gastroduodenal A

Question 18

What ligament is associated with the proper hepatic A

Answer 18

Hepatoduodenal L

Question 19

What does the right gastric A anastomose with and what do they supply

Answer 19

Left gastric A; distal stomach

Question 20

What A supplies the bile ducts

Answer 20

R + L hepatic A

Question 21

Where does the majority of blood come to the liver from

Answer 21

Hepatic portal V

Question 22

What V drain blood from the liver

Answer 22

Middle hepatic V
R hepatic V
L hepatic V

Question 23

What organs drain into the hepatic portal system

Answer 23

Spleen
Stomach
Colon
Pancreas
SI

Question 24

What does the gastric V anastomose with

Answer 24

Esophageal V

Question 25

What is the importance of the portal V anastomoses

Answer 25

They are ways to get blood back into the IVC when the liver is cirrhosed

Question 26

What does the epigastric V anastomose with

Answer 26

Paraumbilical V

Question 27

What does the superior rectal V anastomose with

Answer 27

Middle rectal V

Question 28

Who is SMA syndrome more common in

Answer 28

Women

Question 29

What supplies the sigmoid colon

Answer 29

IMA

Question 30

Where does the superior rectal A

Answer 30

IMA

Question 31

what is the marginal A of drummond comprised of

Answer 31

``` Ileocolic A R colic A Middle colic A L colic A Sigmoidal A SMA + IMA ```

Question 32

What controls the ANS

Answer 32

Hypothalamus

Question 33

Sympathetic activation ________ motility in GI; parasympathetic activation ___________ in GI

Answer 33

Decrease; increase

Question 34

What levels does the sympathetic chain occupy

Answer 34

T1-L2

Question 35

What are the options for sympathetic nerves exiting the cord

Answer 35

Synapse at same level Synapse higher lower Synapse with splanchnic n outside sympathetic chain

Question 36

What level is the greater splanchnic N

Answer 36

T5-9

Question 37

Where does the greater splanchnic N synapse

Answer 37

Celiac ganglion

Question 38

What does the celiac ganglion innvervate

Answer 38

Foregut

Question 39

What level are the lesser splanchnic N

Answer 39

T10-11

Question 40

Where does the lesser splanchnic N synapse

Answer 40

Mesenteric ganglion

Question 41

Where does the msenteric ganglion innervate

Answer 41

midgut and travels along SMA

Question 42

What level does the least splanchnic N come from

Answer 42

T12

Question 43

Where does the least splanchnic N synapse

Answer 43

Aorticorenal ganglion

Question 44

What does the aorticorenal ganglion innervate

Answer 44

Kidneys and adrenal medulla

Question 45

What level does the lumbar splanchnic n come from

Answer 45

L1-2

Question 46

Where does the vagus n innervation stop

Answer 46

L colic flexure (splenic flexure)

Question 47

What takes over parasympathetic innervation after the vagus

Answer 47

Pelvic splanchnic n

Question 48

What is SMA syndrome

Answer 48

Lessening of the angle between the AA and the SMA around the 3rd part of the duodenum

Question 49

Which portion of the SI has few arcades and long vasa recta

Answer 49

Jejunum