Question: what are the four main elements that make up the pelvic girdle?
Answer: The bony pelvis consists of the two hip bones (also known as innominate or pelvic bones), the sacrum and the coccyx. There are four articulations within the pelvis: Sacroiliac joints (x2) - between the ilium of the hip bones, and the sacrum. Sacrococcygeal symphysis - between the sacrum and the coccyx.