Basis of division of anatomical segments of liver are all EXCEPT?
**Core Concept**
The liver is divided into anatomical segments based on its vascular supply and biliary drainage. The liver's unique blood supply from the hepatic artery and portal vein, as well as its bile drainage into the common hepatic duct, forms the basis for its segmentation. This division is crucial for surgical planning and liver resection.
**Why the Correct Answer is Right**
The liver is divided into eight segments, each with its own vascular inflow, outflow, and biliary drainage. The hepatic veins, which drain deoxygenated blood from the liver, also play a role in segmental division. The liver's segments are defined by the Couinaud classification, which divides the liver into eight segments based on its vascular and biliary anatomy. This classification is essential for liver surgery and transplantation.
**Why Each Wrong Option is Incorrect**
**Option A:** Not applicable, as this option is missing.
**Option B:** Not applicable, as this option is missing.
**Option C:** Not applicable, as this option is missing.
*Note: Since the options A, B, and C are missing, we cannot evaluate their correctness.*
**Clinical Pearl / High-Yield Fact**
The liver's unique vascular supply and biliary drainage make it an essential organ for both systemic circulation and digestion. The Couinaud classification is a fundamental concept in liver surgery and transplantation, and understanding its principles is critical for any surgeon or hepatologist.
**Correct Answer:** Not applicable, as the options A, B, and C are missing.