Pivot Point Infection Control 102.2 Practice Test

The humerus is the longest bone of the upper limb, forming the main bone of the arm. It begins at the shoulder joint, where it articulates with the scapula, and ends at the elbow, where it meets the radius and ulna. Radius and ulna are forearm bones that run from the elbow to the wrist, not from shoulder to elbow. The scapula is a flat shoulder blade belonging to the shoulder girdle and does not extend along the limb. Because the humerus spans from shoulder to elbow and is the largest bone in the upper limb, it is the correct choice.