In this lecture we will look at the Pancreas and Spleen.
So we start off by looking at the position of
the pancreas and spleen and how they project onto
the surface. We'll then look at the gross anatomy,
look at the anterior and posterior
views of the pancreas. We will look at its structure.
We will look at the relationship of pancreas
as specifically to the superior mesenteric vessels.
And then we will look at the
blood supply and its venous drainage.
And then towards the end, we will look at the anatomy of
the spleen. But let’s concentrate on
the pancreas which is this leaf shaped
accessory digestive gland that
is positioned transversely across
the posterior abdominal wall.
It's head as we saw previously
sits in the concavity of the "C" shaped duodenum.
It is involved essentially
in producing pancreatic juice which
is its exocrine function. And
producing glucagon and insulin
which is its endocrine function.
So if we look at the surface anatomy,
then here on the torso we can see
we have the "C" shaped duodenum and
we have the head of the pancreas sitting in
that concavity. We can then have
the tail, sorry, the neck and
the body and the tail of the pancreas
passing transversely across the abdomen.
What we would have but we can't see here
is in the tail of the pancreas, we would have the
spleen which will be positioned
over in this left upper quadrant.
It’s difficult to see the pancreas when we
put all the other organs in position; because
it lies posteriorly, the pancreas
is a retroperitoneal organ. And we can actually
see the pancreas would just be
roundabout in this position,
deep to the stomach and surrounded
intimately via the duodenum.
So let’s have some key facts about the pancreas.
It’s an elongated accessory organ of
digestion. It's leaf shape. As I have mentioned,
its head sits within the concavity of
duodenum and the tail runs up
against the hilum of spleen
Its positioned on the posterior wall
of lesser sac (omental bursa) and its
made up of 5 parts. We have a head,
sits against the duodenum.
We have a neck, a body and a tail that
extend towards the hilum of the spleen.
Running inferomedially from the head,
we have this hook like process
known as the Uncinate process.
The root of the transverse mesocolon runs along the Pancreas’s
anterior surface. And as I have mentioned,
the primary functions of pancreas
are exocrine and endocrine.
The exocrine which is going to be secreted away from
the body, so ultimately, it is secreted out with the stools
is it produces pancreatic juice to
aid digestion. And the endocrine function which is
the release of these hormones into
the blood stream like glycogen and insulin.