So let me just summarize the
sorts of structures we've looked at
in this lecture. We'vee looked at the lip,
the tongue, particularly, the dorsal
surface. We'vee looked at salivary glands.
And so in the review then, let's just
summarize the sorts of things that you may
have learned during this lecture.
The oral and masticatory mucosa are very
important because they are very firm
surfaces that aid in resisting the
abrasion in the oral cavity when we
mechanically break down food. They're adhered
to the hard surface of the hard palate.
And that's where most of the breakdown of food
occurs, and also around the gingival
region, which is the bit of the oral
mucosa attaching to the tooth. We saw the
different structures of the tooth, the
enamel that breaks down the food mechanically
into smaller parts; and the tongue, the role
of the tongue, the muscle layers in the
tongue that move the food around inside the
oral cavity and act as a shovel pushing that
food up against the hard palate. And the
tongue has that very sort of corrugated
rough surface on the dorsum of the tongue
that helps to hold that food. The tongue
also, besides being the organ for speech,
is also very important for swallowing.
We didn't go through those two components
in this lecture, but they are covered in
another lecture. But they are very
important functions of the tongue that we
should mention here because they are a part.
Certainly, swallowing is part of the
function of the oral cavity. Speech is very
importantly monitored or changed by
our tongue. It changes the sounds that the
individual has. The tongue, remember,
also contains taste buds which are the
receptor organs for detecting taste.
And remember the different salivary glands,
the parotid, the sublingual, and
the submandibular gland. And just remember
what sort of general secretory products
they do produce and secrete. And know how
to tell the difference between them.
Maybe using my little trick I told
you about earlier in the lecture.
And probably also remember the different duct
systems in these salivary glands and the
importance of the intercalated duct,
and also the striated duct,
particularly, in serous secreting glands.
So thank you for listening to this lecture.
I hope you now know a fair bit of histology
about structures in the oral
cavity, that are very important components
of the digestive system.