So if we look at the foregut now in more detail,
we can see that coming here, we have got the coeliac trunk.
The coeliac trunk is going to give rise to
left gastric artery here. And this will
run along the lesser curvature of the stomach.
We can also see that coming away from the coeliac trunk
is what's known as the common hepatic artery.
And the common hepatic artery will give rise to a
blood vessel which is called the gastroduodenal.
We will come back to that later on. And then once
it’s giving rise to the gastroduodenal
it then becomes the hepatic artery proper.
And coming from the hepatic artery proper
we then find we have the right gastric.
And the right gastric artery
is going to anastomose with the left gastric artery
around the lesser curvature of the stomach.
Remember we spoke about this briefly when we did
the anatomy of the stomach in the earlier lecture.
Running around this lesser curvature we have
the left gastric and the right gastric forming this loop.
Another branch that we haven't mentioned yet coming
from the coeliac trunk is this large splenic artery
that runs to the spleen.
This gives rise to some short gastric arteries
that supply the fundus and the
posterior body of the stomach. And as
it approaches the hilum of the spleen
the splenic artery gives rise
to this left gastro-omental artery
The left gastro-omental artery runs
along the greater curvature of the stomach
And this is going to actually anastomose
from another anastomotic loop
with the right gastro-omental artery.
And this gastro-omental artery
comes from the gastroduodenal
that I mentioned.
So we can see that the coeliac trunk
gives rise to two anastomotic
wings of arteries that supply both
the lesser curvature and the greater curvature.
We can return to the vasculature of the liver
and the coeliac trunk giving rise to the hepatic artery.
then the hepatic artery proper will
ultimately then run up and supply
the left and right hepatic arteries to
the left and right functional lobes.
We also have the cystic artery which comes typically
from the right and that runs to the gallbladder.
If we then look on the other side of the
screen, we can see the actual detail
which is the gastroduodenal artery
bifurcating and giving rise
to important blood vessels that supply
the head of the pancreas and the duodenum.
Here we can see the gastroduodenal artery. Now remember
the gastroduodenal artery would've given rise
to a right gastro-omental. And then
the gastroduodenal artery continues
and it bifurcates into two.
It bifurcates into two arteries
which are the anterior and posterior
superior pancreaticoduodenal arteries.
We can see we have got a very
short stem of superior pancreaticoduodenal
artery which quickly goes into a
posterior and an anterior that are passing inferiorly
towards the head of the pancreas and to the duodenum.
Now these two blood vessels, anterior
and posterior, superior
pancreaticoduodenal arteries are going
to anatomose with the equivalent branches
anterior and posterior branches of
the inferior pancreaticoduodenal arteries.
And the inferior pancreaticoduodenal artery comes from the
superior mesenteric artery.
So here we can just about make out approximately
where the major duodenal papilla would be located.
We can see that everything in
this direction is going to be foregut
and everything in this direction is going
to be the midgut. So this region
is going to be supplied by the inferior
pancreaticoduodenal artery from the
superior mesenteric artery.
Whereas everything in this direction
is going to be supplied by the
superior pancreaticoduodenal artery.
And this is a branch from the coeliac trunk.
And here we have this important
transition, transition of blood
between the foregut and the midgut.