00:00
Now, there's a fair bit of writing on
this section, but I want you to focus
really on a couple of major points that
I'll describe. Have a look at the top of
this slide and concentrate on the diagram
showing the cardiac glands. I mentioned
gastric glands before. Now I want to just
briefly mention cardiac glands. And when
I talk about these glands, I also refer
to the pyloric glands down in
the pyloric region of the stomach.
These cardiac glands are in the
cardio region of the stomach.
00:41
So the areas of the mucosa that are adjacent
to the esophagus, and also in the case of
the pyloric glands, they're adjacent to
the pylorus. And in these two regions, as I
indicated before when I was talking about
the esophagus, basically, the glands
are mucous secreting. And as you see
in this little diagram,
they are long simple coiled tubular glands.
When you look across the right-hand side
at the histological section, all you do
is see profiles or all these glands, and
you just see layers and layers and
layers of cells, secretory cells.
01:28
Because these glands are so concentrated,
you don't see them in this tubular form. You just
see them as a sheath of cells, the sheath
of secretory cells. The pyloric
glands are very similar. Now these two
glands secrete mucous, high amounts of
mucous, again, to first of all neutralize
any acid reflux into the esophagus, and
also to neutralize any acid passing
into the duodenum. And if you look
carefully on the histological section,
this is actually the junction between
one of these areas of the cardiac glands
and the main gastric glands, because if
you look at the histological section on
the far right of this section, you'll notice
the sheath of cells that I spoke about
is a bit paler staining than towards the
left-hand side of that histological
section where it begins to change to be
gastric glandular tissue. The paler stained
coloration refers to the mucous
because the mucous is often
lost during processing.