citation needed] Increased pressure in the sublobular branches of the hepatic veins causes an engorgement of venous blood, and is most frequently due to chronic cardiac lesions, especially those affecting the right heart (e.g., right-sided heart failure), the blood being dammed back in the inferior vena cava and hepatic veins. (wikipedia.org)
From the central veins the blood is carried into larger channels or sublobular veins, which pass to the hepatic veins, and so to the inferior vena cava. (co.ma)
The hepatic veins, formed by the union of the sublobular vessels, gradually unite with one another, and run towards the inferior vena cava. (co.ma)
Lobules3
Central regions of the hepatic lobules are red-brown and stand out against the non-congested, tan-coloured liver. (wikipedia.org)
The terminal branches of the artery end in the branches from the portal vein which go to the liver lobules. (co.ma)
Finally, the small terminal branches form an elaborate meshwork, whose vessels anastomose freely with one another, around the periphery of the liver lobules, and are known as interlobular vessels. (co.ma)
Liver7
Macroscopically, the liver has a pale and spotty appearance in affected areas, as stasis of the blood causes pericentral hepatocytes (liver cells surrounding the central venule of the liver) to become deoxygenated compared to the relatively better-oxygenated periportal hepatocytes adjacent to the hepatic arterioles. (wikipedia.org)
Each breaks up into two chief branches-a right and a left-and several smaller ones, which enter the liver substance, surrounded by a prolongation of the connective tissue coat of the liver (O.T. Glisson's capsule). (co.ma)
DIAGRAM illustrating the arrangement of the blood-vessels (on left) and of the hepatic cells an bile-ducts (on right) within a lobule of the liver. (co.ma)
The hepatic artery has but a small part to play in the hepatic circulation within the liver, and it is distributed in the following way. (co.ma)
Reaching the porta hepatis of the liver it breaks up into branches which accompany the branches of the bile-ducts and of the portal vein into the interior, and it supplies minute branches, known as the vaginal and capsular branches, to the fibrous tissue which accompanies these vessels, and which also invests the surface of the liver. (co.ma)
The portal vein within the liver divides, like an artery, into numerous branches, which pass in all directions in company with small branches of the bile-ducts. (co.ma)
From this meshwork small capillary-like channels pass into the interior of each lobule between columns of liver cells, towards a channel placed in the centre of the lobule, called the central vein. (co.ma)
Small2
the dark spots represent the dilated and congested hepatic venules and small hepatic veins. (wikipedia.org)
The hepatic veins and their branches are not accompanied by branches of the bile-ducts, and are surrounded by a very small amount of connective tissue. (co.ma)