00:01
Now let's take a look
at the oral cavity.
00:05
The oral cavity is
bounded anteriorly
by the oral fissure,
really the space
between the lips.
00:14
Posteriorly, we have the
oropharyngeal isthmus,
beyond which,
were beyond the oral cavity
and into the oropharynx.
00:24
Laterally we have the cheeks.
00:28
When we look from below towards the
superior aspect of the oral cavity,
we see the hard and soft palates
and these form the roof
of the oral cavity.
00:39
The hard palate is the area that has
bone and the soft palate lacks bone.
00:44
If we're looking down, we
actually see the tongue,
a very complicated
ball of muscles.
00:50
As well as what's called
the muscular diaphragm.
00:53
And a lot of these muscles
are going to be composed
of what are called
suprahyoid muscles
or muscles that attach
to the hyoid bone.
01:02
Together these are gonna make
up the floor of the oral cavity.
01:06
Here we see a little space
between the lips in the teeth
called the oral vestibule.
01:13
Beyond which we have
the oral cavity proper.
01:19
And in a sagittal cross
section through the midline,
we can see some of the skeletal
framework for the oral cavity.
01:27
We have the mandible
forming the lower portion.
01:32
And then more posteriorly,
we have that very important
neck bone called the hyoid.
01:39
More superiorly we
have the maxilla.
01:43
And posterior to the maxilla
is the rest of the hard palate
formed by the palatine bone.