i dunno if this helps:
Purpose of the Humerus, Radius, Ulna, Tibia, Femur, Fibula is: to provide support and to help with movement.
The purpose of the Scapula is: to protect and provide attachement site for mucsles
The 3 'uses' of the skeleton are:
1) To provide a framework for the body
2) To provide levers for the muscles to operate
3) To provide protection to vital organs
(I knew those St Johns classes would come in handy!)
Are you looking for a specific answer for just these bones (such as a quiz answer), or were you just curious?