Radius

The radius is part of the skeleton of the forearm.

Location of the radius

The radius is a forearm bone parallel to the ulna located between:

• the humerus at the elbow ;
• and the thumb in the hand.

Structure of the radius

The radius is a long bone formed from:

• a diaphysis, the central part which is slightly curved; and
• two epiphyses, distal and proximal, which are involved in the elbow and wrist joints.

Function of the radius

The radius articulates in the elbow to allow the forearm to flex and in the wrist to articulate the hand.