Name the bones of the os coxae that articulate anteriorly?
The right and left halves of the pelvis are called the os coxae, or innominate bones. They are shaped a little like an ossified pair of granny panties that has been cut in half down the middle.
The os coxae themselves each consist of three bones. The ilium is the top portion of the pelvis, where hands rest on hips; the ischium is further down, and includes the knobbly sitz-bones, or ischial tuberosities; and the pubis is at the front base of the pelvis. It is most anterior.