Humerus
long bone of the upper arm
The humerus is the upper forearm bone in tetrapods. It connects to the shoulder blade (scapula) at the upper end, and the elbow below.

Images Edit
-
Attachment at the shoulder
-
Left humerus head
-
Left humerus head, from other side
-
Left humerus at the elbow
-
Ellbow, other side
-
Elbow, stretched