What bone is referred to as the upper arm bone?

The upper arm bone is known as the humerus. This bone plays a crucial role in the structure of the arm, connecting the shoulder to the elbow. It provides attachment points for muscles that allow for a wide range of movements, such as lifting and throwing. The humerus is essential for the function of the upper limb, supporting the arm during various activities and contributing to the overall coordination and strength needed for tasks involving the hands and shoulders.

In contrast, the clavicle is the collarbone, which connects the arm to the body, but does not serve as the primary bone of the upper arm. The ulna and radius are the two bones of the forearm, situated between the elbow and the wrist, and they do not include the upper arm. Thus, the humerus is distinctly recognized as the upper arm bone.