The greater omentum.
The greater omentum is this apron
like structure that I have spoken about.
Here we can see hanging
down from the stomach
and then running back up
towards the transverse colon.
This is the greater omentum,
this apron like structure.
It's pretty fatty and it's really important because
it actually prevents the visceral peritoneum
around the organs
from attaching to the parietal
peritoneum of the abdominal wall.
So it forms the nice kind of apron
like boundary. It's incredibly mobile
and its important function is, sometimes
we refer to it as the policeman
of the abdomen - as it can
surround an inflamed organ.
If an organ becomes inflamed, then it
can become quite sticky with fibrin
and then these parts can actually stick together
and you can have what's known as the adhesion.
The greater omentum can
actually migrate to this
area and it can kinda close it off
and it can limit the inflammation.
Therefore limit the spread of these
adhesion. So great omentum is
really really quite important.
The greater omentum, like the lesser
omentum, can be split into three parts.
Three peritoneal ligaments
make up the greater omentum.
And it's relatively
The ligament is
named after the two
organs that it runs between,
so the gastrocolic ligament.
The gastrocolic ligament is
running from the stomach to the
transverse colon. So all of this behavior
is known as the gastrocolic ligament.
Difficult to see on these diagram,
but an extension towards the left.
The greater omentum extended from the
stomach to spleen, gastrosplenic ligament.
It can then extend all the way up and pass in
the stomach to the diaphram, the gastrophrenic ligament.
So gastrocolic is this
main visible part here.
Gastrosplenic: stomach to spleen.
Gastrophrenic: Stomach to the diaphragm.
So the greater sac.
We have explored the greater sac
in a bit of detail before hand.
But it has an important aspect because
fluid - if it builds up
in the peritoneal cavity
can communicate freely around the
greater sac and we can see that here if you
look at the supra and infracolic compartment.
So here we have got the greater sac and we have
got its transverse, ascending and the descending
colon here. And the small
intestine in between here.
And everything that's underneath this transverse colon,
as I mentioned, is in the intracolic compartment.
So we can see we have got small intestines,
ascending and descending colon.
If we look at the root of the mesentery which is
running in this kind of approximate direction.
We can see that the infracolic compartment
is actually divided into two.
We can see we have a left one
here and a right one here.
And these two parts the
two parts of the infracolic compartment,
both contain what are known
as the paracolic gutters.
And these allow communication between
the supra and the infra
So we have these paracolic
gutters that are positioned
lateral to the ascending
and descending colon.
So if we imagine here is the transverse colon
that's been removed. This is supracolic
and this is infracolic down here.
These paracolic gutters allow fluid
to progress, to pass through
the abdominal cavity. So we can see
we have these paracolic gutters that
allow the free fluid to pass throughout
the abdominal cavity.
We have an important
which is the deepest part when
the body is aligned supine
and that's just underneath the liver and above
the superior pole of the right kidney.
And fluid can accumulate there when
you're supine and then pass down
in towards the pelvis
via the paracolic gutter.
So these paracolic gutters within the greater
sac are important in fluid communication.