Anatomy of the liver - Kumar

Question 1

What region of the abdomen is the liver found?

Answer 1

• right hypochondrium

Question 2

Describe the lobes of the liver.

Answer 2

• Left and right lobe separated by middle hepatic vein
• Right lobe is separated into caudate (I lobe) and quadrate lobes
• 8 subdivisions: II-IV left hemiliver, V-VIII right hemiliver
• Subdivided by divisions of right, middle and left hepatic veins
• Each segment has own portal pedicle, permitting individual segment resection surgery

Question 3

What 2 vessels deliver the hepatic blood supply?

Answer 3

• The hepatic artery (25%)

* The portal vein (75%)

Question 4

How does the blood through the liver?

Answer 4

• From the hepatic artery and portal vein, blood is distributed into the 8 segments and flows into the sinusoids via the portal tracts.
• Blood leaves the sinusoids into branches of the hepatic vein, which join into 3 main branches before entering the IVC.

Question 5

What is the functional hepatic unit?

Answer 5

• Acinus

Question 6

What regulates sinusoidal blood flow?

Answer 6

• Stellate cells

Question 7

Where does the gall bladder lie?

Answer 7

• Under the right lobe of the liver

Question 8

Where does the common bile duct drain?

Answer 8

• The second part of the duodenum at the ampulla of Vater (which contains the muscular sphincter of Oddi)