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

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Multiple Choice

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

Explanation:
The forearm has two parallel bones, and the one on the thumb side is the radius. In anatomical position (standing with palms facing forward), the radius is on the lateral, or thumb, side, while the ulna sits on the medial, or pinky, side. The radius and ulna work together to allow forearm rotation, with the radius crossing over the ulna when you pronate your hand. The scapula and humerus belong to the shoulder girdle and upper arm, not the forearm. So the outer forearm bone on the thumb side is the radius.

The forearm has two parallel bones, and the one on the thumb side is the radius. In anatomical position (standing with palms facing forward), the radius is on the lateral, or thumb, side, while the ulna sits on the medial, or pinky, side. The radius and ulna work together to allow forearm rotation, with the radius crossing over the ulna when you pronate your hand. The scapula and humerus belong to the shoulder girdle and upper arm, not the forearm. So the outer forearm bone on the thumb side is the radius.

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