Which statement is TRUE regarding the humerus?

The statement regarding the humerus that is true is that the head of the humerus connects to the scapula. This articulation occurs at the glenohumeral joint, which is the main joint of the shoulder. The head of the humerus is a rounded structure that fits into the shallow socket of the scapula known as the glenoid cavity. This connection allows for a wide range of motion of the arm.

Understanding the anatomy of the humerus and its articulating structures is crucial for comprehending shoulder mechanics and overall upper limb movement. The head's shape and its fit into the glenoid cavity allow for significant mobility while also relying on surrounding muscles and ligaments for stability.

The other statements describe features that are not accurate. For instance, the lateral epicondyle does not articulate with the ulna; rather, the ulna connects with other structures at the elbow. Similarly, the capitulum, which is found on the distal end of the humerus, articulates with the radius, not the ulna. Lastly, the lateral epicondyle is located on the lateral side of the elbow, not the medial side, making that statement incorrect as well.