How to distinguish ulna radius

The ulna and radius are two long tubular bones that make up the forearm, connecting the elbow joint and wrist joint respectively. Simply distinguish the ulna and radius, and you can straighten the hand completely, palm up, on the side of the thumb, that is, the radius, and on the side of the little finger, that is, the ulna. When the elbow joint is flexed, the shoulder structure protruding behind the elbow joint is the olecranon of the ulna. It is the olecranon where the ulna and humerus form a joint. Along the olecranon, like a hand, the bone that can be touched under the skin is the ulna. The whole length of the ulna can be touched under the skin. In the wrist, the palm is facing upward. The bone on the thumb side is the radius, and the bone on the little finger side is the ulna. When the wrist is rotated, the ulna and radius rotate with each other.