The biceps are two-headed muscles on the front part of the upper arm. They are divided into two parts: the long head and the short head. They are one of the skeletal muscles that help in the movement of the elbow and the shoulder. While lifting the load, the motion of the shoulder and the elbow joints is controlled by the biceps. The biceps pull the bones near the elbow when we raise our forearm.
The triceps are located in the upper arm of the human body. They travel down between the shoulder and the elbow along the humerus, the long bone in the arm. In association with biceps, they facilitate extension and contraction of the forearm. The biceps and the triceps work in association. The main function of the triceps is the extension of the elbow joint which results in the straightening of the arm. The triceps and the biceps are the opponent of each other.