Part of skeletal system, the humerus is a long bone in the arm or forelimb that runs from the shoulder to the elbow.
Like all bones it gives shape to the body and acts as an attachment site for the muscles around it.
Anatomically, it connects the scapula and the lower arm (consisting of the radius and ulna ).

Position of Humerus:

Position of Humerus

A diagram of this bone:

Diagram of Humerus