The pelvis is bounded posteriorly by the sacrum and coccyx and laterally and anteriorly by the lower ilium, ischium, and pubis bones.

The pelvis is a bowl-shaped structure located at the base of the spine. It is bounded at the back by the sacrum and coccyx, which are part of the vertebral column. On the sides and front, it is bounded by the lower parts of the ilium, ischium, and pubis bones, which are part of the hip bones. These bones are connected to each other at the pubic symphysis in the front and the sacroiliac joints at the back. The pelvis supports the weight of the upper body and helps transfer this weight to the lower limbs during standing and walking. It also protects the pelvic and lower abdominal organs.