Lobes of the liver

What are the two classifications of the lobes of the liver?

Anatomical lobes

and Functional (Physiological) lobes.

By what structure are the anatomical lobes divided on the diaphragmatic surface?

The falciform ligament divides the liver into right and left lobes.

Which anatomical lobe forms the base of the wedge-shaped liver and how does its size compare to the other?

The right lobe,

about six times larger than the left lobe.

How many anatomical lobes are seen on the visceral surface of the liver, and what are they?

Four lobes

is right,

left,

quadrate,

and caudate lobes.

Which structures on the visceral surface form the H-shaped figure?

Fissure for ligamentum teres

Fissure for ligamentum venosum

Porta hepatis

Groove for inferior vena cava

Fossa for gallbladder

Why are anatomical lobes not considered true lobes?

Because they are based only on surface features and do not correspond to the internal architecture of the liver.

On what basis are the functional (physiological) lobes divided?

Based on intrahepatic distribution of the

bile ducts,

hepatic artery,

and portal vein.

What plane divides the functional right and left lobes of the liver?

The imaginary sagittal plane (Cantlie’s plane).

How does Cantlie’s plane pass on the diaphragmatic surface?

From the inferior vena cava to the cystic notch.

How does Cantlie’s plane pass on the visceral surface?

Through the fossa for the gallbladder to the groove for the inferior vena cava.

Compare the sizes of the functional right and left lobes.

The functional right and left lobes are approximately equal in size.

What does each functional lobe have of its own?

Each lobe has its own primary branch of the hepatic artery and portal vein, and is drained by its own hepatic duct.