Venous drainage of extrahepatic bile ducts (Anterior view): The epicholedochal venous plexus (of Saint) drain into two marginal veins – 3 o'clock and 9 o'clock marginal veins (paracholedochal venous plexus of Petren) which drain into right gastric vein (RGV), posterior superior pancreaticoduodenal vein (PSPDV) and superior mesenteric vein ...

The hepatic lobule is the structural unit of the liver. It consists of a roughly hexagonal arrangement of plates of hepatocytes radiating outward from a central vein in the center. At the vertices of the lobule are regularly distributed portal triads, containing a bile duct and a terminal branch of the hepatic artery and portal vein.

The lobules are represented classically by prismatic volumes of hexagonal cross section with one triad made of the hepatic artery, the portal vein and the bile duct at each of the 6 hexagon corners, and a central vein along the axis of the lobule.

2024年12月9日 · Bile ducts are categorized into intrahepatic and extrahepatic bile ducts (see Image. Diagram of the Biliary System). Intrahepatic bile ducts include the left and right hepatic ducts, which join to form the common hepatic duct (CHD), while extrahepatic bile ducts include the common bile duct (CBD), which is formed from the CHD and cystic duct.

The bile ducts are divided into the intrahepatic and extrahepatic portions. / Intrahepatic Ducts / bThe intrahepatic ducts run in the portal triads with the portal veins and hepatic arteries. / Bile canaliculi unite to form segmental bile ducts that drain each liver segment. Segmental ducts combine to form sectional ducts. central vein

Fine branches from the posterior superior pancreaticoduodenal, retroportal, gastroduodenal, hepatic and cystic arteries form two plexuses to supply the bile ducts. The paracholedochal plexus, as right and left marginal arteries, run along the margins of the bile duct and the reticular epicholedochal plexus lie on the surface.

The hepatic lobule is an approximate hexagonal or pentagonal shape with a portal vein at each vertex and a central vein branch in the middle (Desmet, 2011). The portal vein (PV), hepatic artery (HA), and intrahepatic bile duct (IHBD) branches are arranged in close association at the vertices in structures known as portal triads.

2022年9月12日 · Zone 3 is the zone that is around the central vein, while zone 1 is the zone that is most distal from the central vein and surrounds the portal triad (portal vein, hepatic artery, and bile duct); hence, it is also called the periportal zone. Zone 2 lies between zone 3 and zone 1. [2] Estimates are that the bile flow in humans averages 620 mL/day.

In the center of a liver lobule is a central vein that drains out to hepatic veins. The edges of the lobules are defined by portal triads, each of which contains a small hepatic artery branch, a portal vein branch, and a small bile duct. There are also some scattered lymphocytes and connective tissue in the triads.

2023年12月21日 · These are regions of connective tissue which include branches of the bile duct, the portal vein, and the hepatic artery. Along the central axis of each lobule runs a central vein , which is a branch of the hepatic vein .