GI-Physiology of liver

Question 1

What are the four liver lobes?

Answer 1

1. two major lobes Left and Right lobes
2. two minor lobes caudate and quadrate lobes

Question 2

identify the four lobes of liver in an image?

Question 3

What are the exit and entry blood vessels of the liver?

Answer 3

• Exit: Hepatic veins which drain into the IVC
• Entery : Hepatic portal vein which takes all blood from Alimentary canal ( spleen, colon, stomach, pancreas, small intestine) into the liver. This blood is rich in nutrients but poor in Oxygen.
  1. Entery : Aorta–> coeliac arterty–> Hepatic artery—-> Liver. This blood is rich in oxygen, but poor in nutrients.

blood from the hepatic artery and blood from portal vein mix together at the hepatic sinusoid and drain into the hepatic vein which drains into the IVC.

Question 4

What is the function of hepatocytes?

Answer 4

1. make bile
2. store nutrients
3. and detoxification

Question 5

What is the relationship between Portal traid + Portal hepatic system?

Answer 5

all blood from alimentary system ( colon, small intestine, spleen, stomch) drains into the portal hepatic vein—> portal hepatic vein drains into the portal traid—-> blood rich in Oxygen comes from the hepatic artery which a branch of the coeliac artery–> blood from hepatic artery also drain into the portal traid—> the two blood from hepatic arttery and portal hepatic vein drain and mix in the hepatic sinusoid—> the hepatocyte process the mixed blood –> then the blood is drains into the central vein—> then into the hepatic vein—> finally into the IVC.

Question 6

what is the entry and exit point of all blood vessels in the liver called? and what other things that goes through that point?

Answer 6

• is called the Porta
• lymphatic vessels
• ducts
• hepatic nerve plexus

Question 7

production and secretion of Bile is the function of what organ?

Answer 7

Liver

Question 8

What are the six componants of Bile?

Answer 8

These three are made up in the liver

1. Bile Acid
2. Lacithin
3. Cholesterol

these are not

1. Bile pigments — > Bilirubin ( from haemoglobin)
2. toxic metal ——> detoxified in the liver
3. Bicarbonate —–> neutralise acid of the Chyme

Question 9

What seperates the right and left lobes of the liver?

Answer 9

folciform ligament