Final answer:
The bony pelvis is made up of the right and left hip bones, sacrum, and coccyx, with each hip bone being a fusion of the ilium, ischium, and pubis bones.
Step-by-step explanation:
The four bones that make up the bony pelvis are the right and left hip bones, the sacrum, and the coccyx. The primary role of the pelvic girdle is to support the weight of the upper body, transfer weight to the lower limbs, serve as a muscle attachment point, and protect internal pelvic organs. Each hip bone, also known as a coxal bone, is individually made up of three components that fuse together in late adolescence: the ilium, ischium, and pubis. These components provide a robust structure that connects to the axial skeleton and support the lower limbs. The pelvic girdle ensures strong attachment to the axial skeleton through strong ligaments and articulations, facilitating both body weight support and locomotion.