Which bone connects the humerus with the clavicle?

The correct answer is the scapula. The scapula, also known as the shoulder blade, is a key bone in the shoulder girdle. It connects the humerus, the bone of the upper arm, with the clavicle, or collarbone, at the acromioclavicular joint. This connection is crucial for the mobility and stability of the shoulder joint, allowing for a wide range of movements of the arm.

In contrast, the radius and ulna are bones of the forearm and do not play a role in connecting the humerus to the clavicle. The sternum, or breastbone, serves as a central structure that connects the ribs and the clavicles, but it does not form a direct connection between the humerus and the clavicle. Therefore, the scapula is the bone responsible for the connection in question.