How do bones and muscles work together as a lever?

I think that bones and muscles work like levers in that muscles provide force (through contraction) while one bone acts as a beam, while another acts as an anchor for a muscle. This other bone may also afford the actual hinge upon which the lever turns (such as the Radius, Ulna, Humerus, and Bicep Muscle Group). This is not always the case, however (in example, muscles used to manipulate the fingers and thumb are located in the forearm, with multiple joints in between).

In basic terms of the field, the Origin of a muscle describes where it attaches at the end that is the anchor. The point at which the muscle attaches to the bone that is moved relative to the Origin is called the Insertion. Not all Origins and Insertions are bones, but most skeletal muscles are, indeed, attached as such.