Ulna Bone Diagram. Like other joint tissue it is designed to be able to deform and flex rather than shred or fracture on impact allowing the joint to absorb considerable stress before damage occurs. At the distal extremity of the ulna bone there is a pointed head styloid process.
The radius and the ulnathe ulna is located medially and is both longer and larger than the radius which runs parallel to it laterallythese two bones are held together by the intervening interosseous membrane. Pivot joints only allow for rotation around a single axis. The radius is the lateral of the two bones which makes the ulna the medial bone of the forearm.
It joins with the scapula above at the shoulder joint or glenohumeral joint and with the ulna and radius below at the elbow joint.
The scaphoid bone of the hand is the most commonly fractured carpal bone typically by falling on an outstretched hand foosh. The radius and ulna together constitute the forearm. Visit kenhub for more skeletal system quizzes. Forepaw of a front dog leg.