If we look at some of the vasculature
on the posterior abdominal wall,
then we are going to return to the aorta, I mean we have
looked at this already when we looked at the arterial supply
to the GI tract.
And we are going to just
make reference to it once more before
we explore some other blood vessels.
But here in the midline, we can see we
have the aorta. We can see we have the celiac trunk
We have the superior mesenteric artery
and we have the inferior mesenteric artery.
And these really are one of the three
types of blood vessels that come
away from the aorta. We can
see that the aorta has this
three vascular plane phenomenon. It has
three vascular planes.
You have the unpaired
branches that project
forwards and supply the GI tract.
So here we can see we
have these unpaired branches that
are running forwards and these
are going to be our celiac trunk.
Or they are going to be our superior mesenteric artery.
Or they are going to be our inferior mesenteric artery.
And these blood vessels pass
forwards. We're then left with two
paired arteries. We have these
paired arteries that going to the viscera;
see them here and here. And these can be our
renal arteries that pass towards the kidney
or pass towards our suprarenal glands.
We then have some paired
parietal branches and these pass to the body walls.
So these are the synonymous with
the intercostal arteries,
the posterior inter-costal
arteries in the thorax. These
are some lumbar arteries
that helps to supply the musculature
along the posterior abdominal wall.
So the aorta we can see passes
through the aortic hiatus at about T12.
We can see that it extends inferiorly
immediately anterior to the lumbar vertebrae.
And then it divides at about L4, this
region here, into two common iliac arteries.
Divides into two common iliac arteries,
the external iliac goes to supply the lower limb
and the internal iliac, which we will talk
more about in future lectures, enters the pelvis.
We can also see there is a series of other
branches that we haven't referenced so far.
And these are your gonadal blood
vessels. These would be the
paired visceral branches that are going
to supply the testis in the male
or the ovaries in the female.
And they show abdominal aorta.