00:01
So our next sensory organ of
digestion is the pancreas.
00:05
And like the liver,
it doesn't just aid in digestion.
00:09
It has other functions as well.
00:12
Here we see the duodenum
has a very strong close
relationship to the pancreas.
00:18
It forms something of a C shape
that sort of houses this
large portion of the pancreas.
00:26
The bile duct again comes from
the liver and passes posteriorly
behind the pancreas in order
to reach its destination,
which is the major
duodenal papilla.
00:37
Or this bump on the inner
surface of the duodenum,
where bile is going to enter
the GI tract.
00:45
The pancreas has a bunch of cells
called acinar cells
making up the majority of
the volume of the pancreas
that's going to secrete
digestive enzymes
that are going to break down
fats, and proteins,
and lipids and whatnot.
01:01
And those are going to help in the
digestive process along with bile
which is helping
with fat breakdown.
01:10
They're also going to
secrete bicarbonate.
01:13
And that's important
because the duodenum
is the first part of
the small intestine
to receive the
contents of the stomach
and the stomach has a lot of acid.
01:22
So bicarbonate helps to neutralize
some of the acid that's made
its way into the duodenum.
01:28
And also helps make sure
that those digestive enzymes
work properly at the right pH.
01:35
The non-digestive portion
or non-exocrine portion
of the pancreas is
the endocrine portion.
01:43
And that's where
hormones are being made.
01:46
And they're coalesced
into spherical areas
called the islets of Langerhans.
01:51
And again,
they have a hormonal role,
and they're going to secrete their
substances into the bloodstream.
01:57
So here again, we have the duodenum
with this somewhat C-shaped
that houses the bulk
of this pancreas here.
02:06
And this portion that's nestled up
against the C shape of the duodenum
is called the head of the pancreas.
02:13
There is a tiny little
nubbin below here
called the uncinate process.
02:19
And this sort of
unequal relationship
to the rest of the pancreas
reflects the nature
of its development.
02:27
The pancreas actually formed
from two separate buds.
02:29
One smaller one,
and one larger one.
02:32
And this unscented process is
the remnant of that smaller bud.
02:37
After the head,
we have the neck of the pancreas.
02:41
And that's the portion
that's going to sit over
the superior mesenteric vessels.
02:48
So we have a superior
mesenteric vein and an artery.
02:53
And that superior mesenteric vein
is going to be one of the things
that supplies the portal
vein of the liver.
02:59
Whereas the superior
mesenteric artery
is a branch off of the aorta.
03:05
After the neck is the
body of the pancreas.
03:09
And then the last part,
which is going to be
very closely related to the
hilum of the spleen is the tail.