Final answer:
The correct answer is false; the sacrum is not located behind the pelvis but is an integral part of the pelvic structure, forming its posterior region.
Step-by-step explanation:
The statement that 'The sacrum is located behind the pelvis' is false. The sacrum is actually part of the pelvis, located at the posterior region of the pelvic cavity. The pelvic structure consists of the right and left hip bones (pelvic bones), the sacrum, and the coccyx.
The sacrum serves as a keystone in this structure, articulating with the hip bones at the sacroiliac joints. Furthermore, it provides structural support as it is where the weight of the upper body is transferred to the pelvis, particularly across its superior base where it is wide and weight bearing. It also serves a central role in the pelvic girdle, supporting the spine and forming the posterior boundary of the pelvic cavity.