What is the largest and longest bone of the upper extremity?
What is the location of the ulna in relation to the radius? (Remember anatomical position)
What is the relationship of the olecranon process to olecranon fossa?
The largest and longest bone of the upper extremity is the humerus.
The ulna is located medially to the radius in anatomical position. This means that when your palms are facing forward, the ulna is on the inner side of your forearm, toward the pinky finger side.
The olecranon process is a bony prominence at the upper end of the ulna, and the olecranon fossa is a depression on the posterior side of the humerus. When the elbow is fully extended, the olecranon process fits into the olecranon fossa to stabilize the joint.