What is the portal triad in the liver, and what does it consist of?

• A. Contains central vein, hepatic artery, bile ductule.
• B. Hepatic portal triad consists of a portal venule, a branch of the hepatic artery, and a bile ductule.
• C. Contains portal venule, central vein, lymphatic vessel.
• D. Contains bile canaliculi and kupffer cells.

Answer: (B)

In the liver, the portal triad refers to the three structures grouped together in each portal tract at the periphery of a hepatic lobule: a branch of the hepatic artery (providing oxygenated blood), a portal venule (a small branch of the portal vein bringing nutrient-rich blood), and a bile ductule (draining bile produced by hepatocytes). The central vein sits in the center of the lobule, not in the triad, and components like lymphatics or Kupffer cells are separate. So the correct description is a portal venule, a branch of the hepatic artery, and a bile ductule.