THORAX ABDOMEN AND PELVIS

MEDICAL

PANCREAS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the direction of the blood and bile flow within a liver lobule?
A
blood and bile flow towards the center of the lobule
B
blood flows towards the center and bile towards a triad of the lobule
C
blood and bile flow towards the triad of the lobule
D
bile flows towards the center and blood towards a triad of the lobule
Explanation: 

Detailed explanation-1: -As noted earlier, the classic liver lobule is a hexagonal solid in which the blood flows from the periphery of the lobule to the center, and bile flows in the opposite direction (Fig.

Detailed explanation-2: -Situated around the perimeter of the lobule are branches of the hepatic artery, hepatic portal vein and bile duct. These cluster together at the “corners” of the lobule forming what is called the portal triad. At the mid-point of the lobule is the central vein.

Detailed explanation-3: -The portal triad contains the extrahepatic segments of the portal vein, hepatic artery, and bile ducts. Injury to the portal triad is uncommon but is one of the most difficult to manage traumatic injuries associated with high morbidity and mortality.

Detailed explanation-4: -Hepatic blood flow. In the hepatic lobule, blood enters the lobule via the portal vein and hepatic artery, located within portal triads (PT). This venous and arterial blood then combines and drains through hepatic sinusoids towards the central vein (CV). The direction of blood flow is shown as red arrows.

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