Sitting to the right of the abdominal aorta,
is the inferior vena cava.
Now because of the portal system
we don't have branches coming
into the inferior vena cava
like the aorta gave off.
We don't have equivalent of the celiac trunk
the equivalent of the inferior or the superior
mesenteric arteries passing directly
into the inferior vena cava.
Remember they pass into the
portal vein which goes to the liver.
But they do have some important branches.
So the inferior vena cava receives
all its venous blood
from the lower limbs;
does this by way of common iliac
and the external iliac vein.
It also receives blood from
the posterior body wall via some lumbar veins.
And it also receives blood from
the pelvis via internal iliac vein.
Finally, it’s going to receive
blood via the hepatic veins
which is taking blood
directly from the liver.
And we can see some hepatic veins
positioned at the right top here.
But we have quite a long stretch of
the inferior vena cava that's not really receiving
any venous input.
What we can see that it’s formed
a bit lower than the
bifurcation of the aorta at L5
that's where the two common iliacs,
iliac vein form the inferior vena cava.
coming up here in this direction
to form the inferior vena cava.
And it ascends to the right of the aorta.
It enters into the thorax via the
caval opening which is at T8.
The main blood vessels that do
pass into the inferior vena cava
are the renal veins coming from the left and the
right kidneys. Importantly we can see here that the
kidney on the left has the
left renal vein passing anterior
to the aorta. The left renal vein
receives the left gonadal vein.
Where as the right gonadal vein actually
passes directly into the inferior vena cava.
So the inferior vena cava receives venous blood
from the gonads, where as the testis and the ovaries
But the left one drains into
the right renal vein whilst the right one
drains directly into the IVC.
Receives suprarenal veins which
we will explore in the next lecture
draining from the suprarenal glands
and it receives drainage from the liver.
This is blood that is going to be full
of nutrients that have been processed
by the liver and returning it
quickly into systematic circulation.