<prompt> Diaphysis fracture involves?Skull bonesLong boneSternumRibs  <response>: ANSWER: B Long boneREF: Tureks orthopaedics: principles and their application - page 10The diaphysis is the main or mid-section shaft of a long boneLong bones are found in the extremities: the arms, legs, hands, and feet but not the wrists or ankles. As their name indicates, long bones have a long central shaft with knobby end portionsShort bones, which are cube-shaped, are found in confined spaces such as the wrist and ankle.The ribs, shoulder blades, sternum breastbone, pelvis hips, and most of the bones of the skull are considered flat bones. 