12.7 Anatomy: Vessels, nerves and lymphatics of abdomen

Question 1

Where does the abdominal aorta divide into the L and R common iliac?

Answer 1

L4

Question 2

What does the celiac trunk supply?

Answer 2

Foregut:

Liver until papilla

Question 3

What does the superior mesenteric artery supply?

Answer 3

Midgut:

Rest of duodenum until transverse colon

Question 4

What does the inferior mesenteric artery supply?

Answer 4

Hindgut:

Last part of transverse colon to rectum

Question 5

Describe the divisions of the celiac trunk

Answer 5

Celiac trunk into 3 main branches:
L gastric artery (oesophageal branches)

Splenic arteries (Short gastric, 2x gastroepiploic)

Common hepatic (L hepatic, R hepatic–>cystic artery)

Question 6

What are the arteries of the small intestine?

Answer 6

SMA gives off branches to R:

Intestinal branches to L

1st branch: Anterior inf. pancreodeuodenal artery

2nd branch: R colic

3rd branch: Ileocolic (colic and ileal branch)

Question 7

What are the arteries of the large intestine?

Answer 7

Middle colic artery, R colic artery, Marginal artery

IMA–>superior rectal artery

Question 8

Where does the blood from the GIT go?

Answer 8

Through portal vein (behind neck of pancreas at L2)

Question 9

Where are sites for portosystemic anastamoses? (5)

Answer 9

Behind reteroperitoneal viscera

Top of liver

Lower 3rd of oesophagus

Anal canal (sup rectal vein/mid or inf. rectal vein)

Anterior abdominal wall (umbilical vein/ligamentum teres)

Question 10

What are the innervations of the SNS in the GIT?

Answer 10

Preganglionic (T6-L2)

Ganglion clusters around aorta/renal unpaired As

Question 11

What are the innervations of the PSNS in the GIT

Answer 11

Foregut, midgut (vagus)

Hindgut (pelvic splanchnics)

Postganglionic to viscera (foregut T6-9, midgut T8-12, hindgut T12-L2)

Question 12

What is the drainage of the body?

Answer 12

R lymphatic duct drains R torso/arm/head

Thoracic duct drains everything else