Question

In the centre of each hepatic lobule lies
A. Portal vein
B. Central vein
C. Central artery
D. Bile duct

Answer 1

Hint: Hepatic lobules are the building block of liver tissue and blood enters these lobules via the hepatic artery. Lobule is organised and each lobule is hexagonal in cross section.

Complete answer:
If we look at options, option A is Portal vein. Portal vein is that vein which moves blood from spleen, stomach, pancreas and intestine and then transfer it into the liver for filtration and processing, and it is not present in the centre of each hepatic lobule due to which this option cannot be the correct one and therefore it gets eliminated.
Moving to option B i.e., Central vein. The lobules of liver are organised and it takes the shape of polygonal prisms and each lobule of liver is hexagonal in cross section, and this lobule is centred on a branch of the hepatic vein which is called the central vein. Also, the function of the central vein is to receive the blood mixed in the liver sinusoids and then return it to circulation via the hepatic veins. Therefore, this option is the correct one as in the centre of each hepatic lobule lies central vein.
Moving to option C i.e., Central artery. This option is incorrect as in the centre of each hepatic lobule, there is presence of central vein not central artery due to which this option cannot be considered and it gets eliminated.
Last option D is Bile duct. Bile duct is a series of thin tubes which is connected from liver to the small intestine and from liver it transports bile fluid to the small intestine where it helps in digestion of fats. It is not present in the centre of each hepatic lobule due to which this option is incorrect and it gets eliminated.

Hence, the correct answer is option (B).

Note: Since, hepatic lobules are organised and these are centred on the branch of hepatic vein and that vein is called central vein which is present at the centre of each hepatic lobule. Due to this, the correct option is central vein which is given at option B.