The radius is one of the two long bones in the forearm. It extends from the elbow to the wrist on the thumb side of the arm. The radius rotates around the ulna bone, allowing the hand to rotate and providing flexibility. A projection above the thumb side of the wrist marks the end of the radius bone.

1. Bones of Upper limb

3. Clavicle

5. Dorsal

7. Radius (arm)
• The shorter of the two long bones of the forearm,
extending from the elbow to the wrist;
• it is the bone on the thumb side of the arm.
• The radius rotates around the ulna, permitting
the hand to rotate and be flexible.
• A projection just above the thumb side of the
wrist marks the end of the radius.