The pelvic girdle, or hip bones, is an important part of the body that supports and connects the legs to the torso. Synonyms for the pelvic girdle include the pelvic bones, the hip bones, the innominate bones, the coxal bones, and the os coxae. The pelvic girdle consists of two hip bones, each made up of three bones fused together to form the ilium, ischium, and pubis. These bones are connected to the sacrum at the base of the spine and play a crucial role in walking, running, and maintaining balance. Understanding the different names and components of the pelvic girdle can aid in identifying and treating related injuries and conditions.