The principal function of the humerus is as a muscular insertion and origination point for a number of muscles, including the deltoid and pectoralis major. Since it is connected to the shoulder via a rotational joint, the humerus also supports the arm's various physical functions, such as lifting.
The humerus is the long bone of the upper arm, connecting the elbow and the shoulder via the ulna and scapula respectively. The brachial artery travels the length of this bone before subdividing into the ulnar and radial arteries at the elbow. It is also traversed by the radial nerve, which facilitates the arm's and forearm's sensory and motor functions.
The humerus is one of the longest and most frequently damaged bones in the human body.