Which bone is the outer forearm bone on the thumb side?

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Multiple Choice

Which bone is the outer forearm bone on the thumb side?

Explanation:
In anatomical position, the forearm has two long bones: the radius on the thumb side and the ulna on the opposite, pinky side. The radius is the outer bone toward the thumb, running from elbow to wrist and nicely aligning with the thumb when you place your palm forward. The ulna stays on the inner side and forms the other limb of the forearm’s elbow joint. The scaphoid is a wrist bone (one of the carpal bones) near the thumb, not a forearm bone, and the ilium is part of the pelvis. So the outer forearm bone on the thumb side is the radius.

In anatomical position, the forearm has two long bones: the radius on the thumb side and the ulna on the opposite, pinky side. The radius is the outer bone toward the thumb, running from elbow to wrist and nicely aligning with the thumb when you place your palm forward. The ulna stays on the inner side and forms the other limb of the forearm’s elbow joint. The scaphoid is a wrist bone (one of the carpal bones) near the thumb, not a forearm bone, and the ilium is part of the pelvis. So the outer forearm bone on the thumb side is the radius.

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