What is central vein in liver?
The central veins of liver (or central venules) are veins found at the center of hepatic lobules (one vein at each lobule center). They receive the blood mixed in the liver sinusoids and return it to circulation via the hepatic veins.
How many central veins are in the liver?
The spaces between the plates are occupied by hepatic sinusoids—the liver capillaries. Because there is only one central vein in each lobule, it receives blood from every sinusoid of that lobule.
What are the zones of the liver?
Three zones can be distinguished. 1, the periportal zone; 2, the intermediary zone; 3, the perivenous, pericentral, or centrilobular zone. (B) Liver sinusoid and oxygen gradient.
What is the function of liver lobules?
These lobules are very small. Each lobule is made up of numerous liver cells, called hepatocytes, that line up in radiating rows. Between each row are sinusoids. These small blood vessels diffuse oxygen and nutrients through their capillary walls into the liver cells.
Do you have 2 livers?
The liver has two large sections, called the right and the left lobes.
What are 3 hepatic veins?
Three large intrahepatic veins drain the liver parenchyma, into the inferior vena cava (IVC), and are named the right hepatic vein, middle hepatic vein and left hepatic vein. The veins are important landmarks, running in between and defining the segments of the liver.
What is liver anatomy?
The liver is located in the upper right-hand portion of the abdominal cavity, beneath the diaphragm, and on top of the stomach, right kidney, and intestines. Shaped like a cone, the liver is a dark reddish-brown organ that weighs about 3 pounds.
What does Zone 2 of the liver do?
The liver is organized into zones in which hepatocytes express different metabolic enzymes. Therefore, different regions of the lobule exhibit differences in their contribution to hepatocyte turnover, and zone 2 is an important source of new hepatocytes during homeostasis and regeneration.
What are the 4 lobes of the liver?
Anatomically the liver has four lobes: right, left, caudate, and quadrate. The quadrate lobe is located on the inferior surface of the right lobe. The caudate lobe is located between the left and right lobes in an anterior and superior location.
Why does the liver have 2 lobes?
The question is why are different lobes present, may be this is because, liver being the largest organ has to fit in the small area, hence evolutionarily there are lobes to accommodate in the small area.
How is the liver connected to the rest of the body?
The liver is connected to two large blood vessels, the hepatic artery and the portal vein. The hepatic artery carries blood from the aorta to the liver, whereas the portal vein carries blood containing the digested nutrients from the entire gastrointestinal tract, and also from the spleen and pancreas to the liver.
Where does the blood go after leaving the liver?
Blood flows through the liver tissue and empties into the central vein of each lobule. The central veins coalesce into hepatic veins that collect the blood leaving the liver and bring it to the heart. Hepatic veins: An image of a liver with the hepatic veins labeled.
Where are the hepatic arteries located in the liver?
Key Terms hepatic arteries: A blood vessel that supplies oxygenated blood to the liver. hepatic portal vein: A vessel located in the abdominal cavity that is formed by the union of the superior mesenteric and splenic veins that channel blood from the gastrointestinal tract and spleen to the capillary beds in the liver.
What does the triangle mean in liver histology?
In this case, each functional unit is a triangle, having a central axis through a portal field and the imaginary vertices through the three different but closest portal canals surrounding it. The area covered by the triangle represents the hepatic regions that secrete bile into the same bile duct.