The bony pelvis is formed by 4 bones; a pair of hip bones, the sacrum and the coccyx. The bony pelvis supports the pelvic viscera and works to transmit force from the axial skeleton to the lower limbs.
The two hip bones are related anteriorly at the symphysis pubis and posteriorly to the sacroiliac joint bilaterally.
This particular 3D model shows some irregular material floating within the pelvic cavity which represents a contrast media in the colon, that contrast media is given for patients prior to CT scans to distinguish intestinal loops.
This 3D model was created from the file STS_044. This file was created from this CT scan