Larte Intestine And Lumbosacral Plexus

Question 1

The _______ of the Large intestine Lies deep to ribs 9 and 10 and is overlapped by the liver.

Answer 1

Right Colic flexure

Question 2

The __________ of the large intestine is more superior, more acute, less mobile, and anterior to the kidney.

Answer 2

Left Colic flexure

Question 3

The left colic flexure is supported by two ligaments:

Answer 3

• Phrenicolic

- Transverse mesocolon

Question 4

The _______ Colon is retroperitoneal while the ______ colon is intraperitoneal.

Answer 4

Descending; Sigmoid

Question 5

What is the major anastomoses of the IMA and SMA?

Answer 5

Marginal artery

Question 6

The portal vein is formed behind the _________ by the union of the ________ and _________.

Answer 6

The portal vein is formed behind the head of the pancreas by the union of the SMV and the splenic vein.

Question 7

Major tributaries of the Portal Vein.

Answer 7

• Splenic vein
• SMV
• Pyloric Vein
• Cystic Vein
• Paraumbilical vein

Question 8

What are major Portal vein-Systemic communications?

Answer 8

Left Gastric —> Esophageal (azygos)

Superior rectal —> Inferior/middle rectal (Internal iliac)

Paraumbilical —> Superficial epigastric (External iliac)

Veins of colon, pancreas, and liver —> Renal, lumbar, and phrenic veins (systemic)

Question 9

Describe Portal Hypertension

Answer 9

• It is defined as increased portal venous pressure caused by intrinsic liver disease, or obstruction in the extrahepatic portal vein, or hepatic venous outflow.
• Esophageal varices, Hemorroids, Caput medusa, ascites, Plenomegaly, Mepatic encephalopathy

Question 10

What constitute the lumbosacral plexus?

Answer 10

L4-L5, S1-4