The levator ani is a broad, thin muscle group, situated on either side of the pelvis. It is formed from three muscle components: the pubococcygeus, the iliococcygeus, and the puborectalis.
3D medical illustration presenting levator ani
The pelvis is the lower part of the trunk, between the abdomen and the thighs, together with its embedded skeleton.
The same human pelvis, front imaged by X-ray (top), magnetic resonance imaging (middle), and 3-dimensional computed tomography (bottom)
The pelvic girdle of the dinosaur Falcarius utahensis
Diameters of pelvic inlet