Liver Anatomy Flashcards

1
Q

where is the liver found

A

upper right quadrant of the abdomen, immediately below the diaphragm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Functionally how many lobes

A

2, L and R

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

anatomically how many lobes

A

4

left, right, caudate and quadrate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Diaphragmatic surface

A

superior upper surface of the liver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Visceral surface

A

faces adjacent abdominal organs (downwards)

incl porta hepatis and gallbladder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

where is the caudate lobe

A

next to the inferior vena cava

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

where is the quadrate lobe

A

next to the gall bladder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

falciform ligament

A

separates major left and right lobes and attaches liver to diaphragm and anterior abdominal wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

round ligament

A

found at the lower edge of the falciform ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

gall bladder

A

accessory organ to the liver

rests in a recess on the inferior, visceral surface of the liver

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

function of gall bladder

A

stores bile if not required

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

where does the liver receive blood from

A

heart and GI tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Hepatic portal vein

A

delivers poorly oxygenated blood from GI tract
rich in nutrients
drains blood from capillary beds of the GI tract including spleen and pancreas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

hepatic artery

A

delivers oxygenated blood from the heart

splits into left and right hepatic arteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Proportion of blood from each vessel

A

Aorta to hepatic artery 20-25% blood

hepatic portal vein 75-80% of blood

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

hepatic vein

A

carries blood away from the liver back to the heart

at the centre of each lobe is the central vein that drains into the hepatic vein then the vena cava

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

hepatocytes

A

cells in the liver

18
Q

portal triads

A

at the edge of each lobule- formed by hepatic portal vein, hepatic artery and bile duct

19
Q

blood vs bile flow

A

blood flows from portal triad towards central vein

bile flows in the opposite direction towards the porta triad (contains the bile duct)

20
Q

what do hepatocytes do

A

absorb nutrients from the blood and produce bile that collects in the small bile caniculus

21
Q

what does it mean to say liver cells are polarized

A

part of cell facing bile duct different to part facing blood circulation different

22
Q

What do liver cells separate

A

sinusodial blood and canalicular bile

23
Q

basal membrane faces

A

liver sinusodial endo cells

24
Q

apical membrane contributes to

A

bile canaliculi jointly with the directly opposing hepatocytes

25
Q

space of Disse

A

between haepatocyte cells and sinusodial endothelium

26
Q

what is bile

A

excorine secretory product of the liver

contains HCO3-, cholesterol, lecithin, bile pigments and bile salts

27
Q

what are bile salts important for

A

absorption of water insoluble fats

28
Q

what are bile ducts lined by

A

hepatocytes

29
Q

what is the blood sinusoid lined by

A

single layer of fenestrated endo cells

30
Q

what do the sinusodial endothelial cells do

A

minimize any barrier for bi-directional transfer of small/soluble substrates between blood and extracellular space of Disse
act as a filter between lumen of hepatic sinusoid and hepatocytes

31
Q

Kupffer cells

A

80-90% tissue machrophages in the liver
aka stellate macrophages
found in lumen of sinusoids, adherent to endothelial cells
role in host defence

32
Q

stellate cells

A

found in subendothelial space between basolateral surface of hepatocytes and anti-luminal side of sinusodial endothelial cells
spindle shaped with oval nuclei
single stellate cell normally surrounds more than 2 nearby sinusoids
Involved in fibrosis formation

33
Q

Bile duct circulation

A

bile transported down canaliculi, which empty into bile ductules and then bile ducts
Empties into hepatic ducts
Bile then enters duodenum or diverted to cystic duct in the gal bladder, which concentrates and stores it

34
Q

Gall bladder fundus

A

wide end and projects from the inferior border of the liver

35
Q

Gall bladder body

A

contacts visceral surface of liver

36
Q

Neck of gall bladder

A

narrow and tapered, makes an s bend into cystic duct

Internally the mucosa spirals into the spiral fold that keeps the cystic duct open, stops it being blocked

37
Q

Cystic duct

A

convoluted, connects gall bladder to hepatic duct

modifies bile to generate ductal bile

38
Q

cholangiocytes

A

epithelial cells that line intra and extra hepatic ducts of the biliary tree

39
Q

sphincter of oddi

A

at end of common bile duct

under hormonal control, whether it opens or not controlled by what you’re eating

40
Q

production of bile

A

liver continuously produces bile into the bile duct that goes to the GI tract or gall bladder