So if you look at the blood supply
to the liver and to the gall bladder,
then this is primarily going to be from the coeliac trunk.
The coeliac trunk, which is this branch
that's coming off the aorta.
We spoke about it last when we look at
the blood supply to the stomach.
And we can see that the liver is going to be
supplied by the hepatic artery.
Now the hepatic artery provides only about
twenty percent of the blood supply to the liver.
It supplies the nutrients and the oxygen
that allows the liver to function.
Just like every organ that needs oxygen, needs nutrients,
this is carried out by the hepatic artery via the coeliac trunk.
But the liver actually receives the majority of its blood
via the hepatic portal vein.
About seventy eighty percent of its blood,
from the hepatic portal vein.
This is blood that comes from the gastrointestinal tract.
So it's blood that receive the digested nutrients
that you've eaten from the food,
from the fluid that you've consumed. They then pass it
to the liver which then undertakes this metabolic activity.
What we can see is that the hepatic artery
quickly divides into left and right branches
that will go on to form the left and right functional arteries
that supply the left and right functional lobes.
So these left and right hepatic arteries would supply
the functional lobes of the liver.
We can also see we have a small cystic artery
that typically comes away from the right hepatic artery
or that can be quite variable
it passes to supply the gall bladder.
We can also see running posterior to the hepatic artery,
so posterior to the hepatic artery we have in the portal triad
we have the hepatic portal vein.
This also will split into two portal veins and that will
go to the left and right functional lobes of the liver.
Here we can see, next to the hepatic artery and
the hepatic portal vein we have the bile duct
and there we're seeing a portal triad once again.
Once the blood has gone to the liver,
the liver then needs to pass that processed blood
that's containing now these processed nutrients
that have been worked on by the liver
that the metabolic activities have carried out, have cleaned
the blood essentially made it fit for the systemic circulation.
This blood might passes back into the systemic circulation
by a series of hepatic veins.
And these drain directly from the liver
into the inferior vena cava,
which then quickly passes through the diaphragm
and then into the right atrium of the heart.