Only the radius has a direct articulation with the bones of the wrist.

Name: Only the radius has a direct articulation with the bones of the wrist.
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The radius is one of the two bones in the forearm (the other being the ulna) and it articulates directly with the bones of the wrist, specifically the scaphoid and lunate bones. The ulna does not have a direct articulation with any bones of the wrist, but does help to stabilize the forearm and wrist joint.

Only the Radius Has a Direct Articulation with the Bones