Answer:
The correct answer is- a portal triad.
Explanation:
The building block of the liver is hepatic lobules. They are different from the lobes or are smaller lobes. It comprises of a portal triad and hepatocytes and they are microscopic structures.
Portal triad is composed of mainly three tubes that are:
1. Branches of the hepatic artery which functions in carrying the oxygenated blood to the parenchymal hepatocytes.
2. Branch of hepatic portal vein that carries blood enriched with nutrients from small intestine and
3. A small branch of the bile duct that carries digestive bile from hepatocytes to gall bladder.
Therefore the correct answer is portal triad.
