Which structure is found only in the ulna within the elbow?

The olecranon process is a prominent feature found exclusively on the ulna, specifically at the proximal end of the bone, and is crucial to the elbow joint. It forms the prominent tip of the elbow that can be easily felt when the arm is extended. Its primary function is to serve as an attachment point for the triceps brachii muscle, which is responsible for extending the forearm.

This structure plays a vital role in elbow flexion and extension mechanics, articulating with the humerus to allow for a smooth range of motion. Understanding the unique features of the ulna, such as the olecranon process, is essential for studying human anatomy, particularly in contexts related to joint function and mobility.