Welcome to this lecture on “The Pelvis”.
This slide lists the learning objectives that
you should be able to answer at the conclusion
of this presentation.
List the components of the pelvis and describe
the three bones that constitute the pelvic
Describe the false pelvis and true pelvis
as well as the inlet and outlet.
Describe the components of the pelvic wall
and its apertures.
Describe the components of the pelvic floor.
Compare and contrast the contents found in
the deep perineal pouch of men and women.
Compare and contrast a male pelvis with a
Describe the joints and ligaments associated
with the pelvis.
And then we'll summarize the key take-home
messages from this presentation and finish
by presenting attribution for the images that
were used throughout this presentation.
Here is our body map and our region of focus
will be on the inferior aspect of the body
map. Here, we have the superior most projection,
the iliac crest, extending over to this region
here. Similarly, we can see that general area
on the posterior view and so, we'll be working
our way inferior to that line.
When we think about the bony pelvis, there
are three components that form the pelvis.
Two of those components are pelvic bones.
We have a pelvic bone shown here. We have
the opposite pelvic bone shown here. And then
we have the sacrum and coccyx. So, those are
the bony constituents of the pelvis. And so,
now, we'll want to learn a little bit more
about each one of these.
So, let's begin with the largest pelvic contribution
and that would be the pelvic bone itself.
So, we want to understand the components
and the fact that the components of the pelvic
bone will help to form a socket called the
acetabulum. Here, we see the pelvic bone prior
to its maturation or its fusion of its constituent
components. Those components are the ilium
that we see here. This is a lateral view.
Here, we see the contribution of the ilium
to the formation of the acetabulum. We also
have, here, this structure called the ischium.
It, too, contributes to the formation of the
And then the last component that makes up
the pelvic bone is this one in through here,
kind of shaded in orange. This is the pubic
bone and it makes a contribution as well to
the formation of the acetabulum. The ilium
helps to form about 2/5th of the acetabulum,
the ischium about 2/5th as well and then the
pubic bone will help form the remaining 1/5th
to the acetabulum.
Now, let's take a look at the ilium. This