What does the root word Leuko mean?

What does the root word Leuko mean?

Leuko- is a combining form used like a prefix meaning “white” or “white blood cell.” It is often used in medical terms, especially in pathology.

What is the basic structural element of the liver called?

Hepatocytes (parenchymal cells) are the basic structural component of the liver, representing 60% of the total cell number and 80% of the total liver volume. They are arranged radially within the lobule to form cellular plates, between which the liver capillaries and the sinusoids are located.

What are sinusoids in liver?

Sinusoid, irregular tubular space for the passage of blood, taking the place of capillaries and venules in the liver, spleen, and bone marrow. The sinusoids form from branches of the portal vein in the liver and from arterioles (minute arteries) in other organs.

What is a liver Acinus?

The hepatic acinus is the functional unit of the liver. As seen overlayed onto lobules in the diagram below, the acinus consists of an irregular shaped, roughly ellipsoidal mass of hepatocytes aligned around the hepatic arterioles and portal venules just as they anastomose into sinusoids.

Why are Sinusoids important?

One reason for the importance of sinusoids is that they are fundamental in physics. Many physical systems that resonate or oscillate produce quasi-sinusoidal motion. Another reason sinusoids are important is that they are eigenfunctions of linear systems (which we’ll say more about in §4.1. 4).

What are the 4 lobes of the liver called?

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.

What is the biggest lobe of the liver?

The left and right lobes are the largest lobes and are separated by the falciform ligament. The right lobe is about 5 to 6 times larger than the tapered left lobe. The small caudate lobe extends from the posterior side of the right lobe and wraps around the inferior vena cava.

How many liver lobes do humans have?

The liver consists of 2 main lobes.

What is quadrate lobe of liver?

The quadrate lobe is an area of the liver situated on the undersurface of the medial segment left lobe (Couinaud segment IVb), bounded in front by the anterior margin of the liver, behind by the porta hepatis, on the right by the fossa for the gall-bladder, and on the left by the fossa for the umbilical vein.

Where is the quadrate lobe of liver?

Quadrate lobe – located on the lower aspect of the visceral surface. It lies between the gallbladder and a fossa produced by the ligamentum teres (a remnant of the fetal umbilical vein).

What are the 3 main functions of the liver?

The primary functions of the liver are:

• Bile production and excretion.
• Excretion of bilirubin, cholesterol, hormones, and drugs.
• Metabolism of fats, proteins, and carbohydrates.
• Enzyme activation.
• Storage of glycogen, vitamins, and minerals.
• Synthesis of plasma proteins, such as albumin, and clotting factors.

What are the two lobes of liver?

The liver has two lobes — the right and the left.

• Each lobe is made up of thousands of hexagonally-shaped 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.

Do liver lobes grow back?

as the missing lobes do not regrow; it is the residual liver lobes that increase in size until the original liver mass is restored. An understanding of liver regeneration is clearly important in the clinical settings of fulminant hepatic failure and after liver resection.

What is a Riedel’s lobe?

Riedel lobe is a tongue-like, inferior projection of the right lobe of the liver beyond the level of the most inferior costal cartilage on cross-sectional images 1. It is not considered a true accessory lobe of the liver but an anatomical variant of the right lobe of the liver 3.

What is segment 2 of the liver?

segments 2 (II) and 3 (III) are to the left of the left hepatic vein and falciform ligament with II superior and III inferior to the portal plane. segment 4 (IV) lies between the left and middle hepatic veins; it is subdivided into 4a (IVa) (superior) and 4b (IVb) (inferior) subsegments.

How do you separate the segments of the liver?

Couinaud classification

1. Right hepatic vein divides the right lobe into anterior and posterior segments.
2. Middle hepatic vein divides the liver into right and left lobes (or right and left hemiliver).
3. The Falciform ligament divides the left lobe into a medial- segment IV and a lateral part – segment II and III.

Where is Segment 2 of the liver?

Segments II and III lie lateral to the falciform ligament with II superior to the portal venous supply and III inferior. Segment IV lies medial to the falciform ligament and is subdivided into IVa (superior) and IVb (inferior).

Where is Segment 3 of the liver?

Seg- ments II and III, which are known as the anterior and poste- rior segments of the left lobe, respectively, are also known collectively as the left lateral segment of the liver and the topographic left lobe. Segment IV is the medial segment of the left lobe.

Should I be worried about liver lesions?

Also referred to as a liver mass or tumor, liver lesions can be either benign (noncancerous) or malignant (cancerous). Benign liver lesions are very common and are generally not a cause for concern. Malignant liver lesions, however, require intervention and treatment.

Which lobe of liver is bifurcated?

The liver is divided into two lobes by the middle hepatic vein: the right lobe of liver and the left lobe of liver. The right lobe of liver is larger than the left lobe of liver.

How much of your liver can be removed?

What makes resection possible is the liver’s natural ability to regenerate. Surgeons can remove up to 80 percent of the liver and it will grow back in a matter of weeks if the remaining liver is healthy.

Can a man live without liver?

The liver performs essential, life-sustaining functions. While you can’t live without a liver completely, you can live with only part of one. Many people can function well with just under half of their liver. Your liver can also grow back to full size within a matter of months.

How many times can you have a liver resection?

Although liver resections are performed with curative intent, 60% will develop recurrent disease. Between 20–30% with recurrence after the first liver resection will have a disease which potentially allows a repeat liver resection. The criteria for surgery are relatively the same as for the initial resection.