Final answer:
The pelvic girdle is formed by two hip bones connected anteriorly at the pubic symphysis and to the sacrum posteriorly at the sacroiliac joints, supporting the body's weight and facilitating movement.
Step-by-step explanation:
The pelvic girdle is an essential skeletal structure responsible for connecting the lower limbs to the axial skeleton. It comprises two hip bones (also known as coxal bones) that are attached to each other anteriorly at the pubic symphysis, and each hip bone is firmly attached to the sacrum posteriorly. These hip bones are formed by the fusion of three bones: the ilium, ischium, and pubis. The pelvic girdle, along with the sacrum and the coccyx, forms the bony pelvis.
Therefore, the pelvic girdle is formed by two hip bones attached to each other at the pubic symphysis anteriorly, and to the sacrum at the sacroiliac joints posteriorly. It supports the weight of the body in locomotion and provides attachment points for various muscles that move the legs and maintain posture.