 Here we have the true pelvis, a fetching shade of magenta. This title is in contrast to the false pelvis which I'll bring in there. So it's got borders at the anterior superior iliac spine and the lumbar vertebra and considering that all the important pelvic anatomy is in this area. This is obviously of the two, the false pelvis, fake pelvis, not the true pelvis. So moving on let's talk about the entry and exit points to the true pelvis which we call the pelvic inlet and the pelvic outlet. Most posteriorly we have the promontory of the sacrum, next the ala of the sacrum which is Latin for wings, the arcuate line, arcuate meaning curved, pectoneal line, attachment for pectoneus, the pubic symphysis and the same on the other side, pectoneal line, arcuate line, ala of sacrum and promontory of sacrum. So this marks the superior border of the true pelvis. If we look around the other side now let's talk about the pelvic outlet. pubic symphysis, ischopubic ramus, ischial tuberosities and we'll just take another angle to draw this back part in, sacro tuberous ligament down the back, oxyx, sacro tuberous ligament, now the ischial tuberosity, left ischopubic ramus and back to the pubic symphysis. The shape of the pelvic outlet varies quite a lot between men and women or male and female sex, it's notably bigger in females because we have to fit a whole baby through here. So before we wrap up, brief mention should go to the other prominent ferraminy in the pelvis, this is the obturator ferramin here and then the two ferramina bordered by these ligaments. This is the greater sciatic ferramin and the lesser sciatic ferramin, they're named after the greater and lesser sciatic notches which they relate to. So I mentioned the sacro tuberous ligament before, get rid of that, show you this is the sacrospinus ligament, they both serve to stabilize the bony pelvis. If we take a step back now, it becomes clear how important orientation is when it comes to anatomy, you've got to be able to reason through the arrangement and the relationships between the nearby structures in your head if possible to imagine how it all fits into life and one important thing to note in that regard with this model is the relationship of the pelvis to the coronal plane, so we have a unique opportunity here to show you that in 3D. So here's the coronal plane and as you can see the ASIS or the anterior superior iliac spine and the pubic tubicles line up with it precisely. So if you're handling some pubic bones in anatomy class just remember that. Okay thanks for watching, hope you got something out of that and we shall see you next time.