to pull the forearm up or closer to the body
it helps you move
The biceps brachii is the muscle on the front of your upper arm. Its purpose is to pull bend your arm at the elbow (flexion). It is one of an antagonistic pair of muscles. The other muscle is the...
The biceps brachii muscle controls three joints, the elbow, shoulder, and the proximal radioulnar joint, which allows the palm to be turned upwards.
It is the muscle in the arm which helps to flex and bend your forearm at the elbow joint