These actions are all facilitated by the muscles of the arm. The human arm is divided into two main sections: the forearm and the arm itself. The forearm is the section located between the elbow and the wrist, while the arm represents the section from the shoulder to the elbow....
area, and thetriceps musclein the back of the upper arm. The triceps, as the name suggests, consists of three heads that originate from different surfaces but share the same insertion at the olecranon process of theulna(abonein the forearm); the three heads together act to extend theelbow....