Bicep.
yes and no it is a muscle but its like any other muscles when you flex your arm your bicep shows
supraspinatus muscle
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
The function of the biceps brachii is to flex your arm at the elbow. However, even though that is the most visible muscle, the brachialis muscle is considered the prime mover in flexing at the elbow.
When you flex your arm, you're performing a concentric contraction. This type of contraction occurs when a muscle shortens while generating force, allowing you to lift or move a weight. During the flexion of your arm, the biceps brachii muscle contracts and shortens, resulting in the bending of the elbow.
Believe it or not, the bicep muscle has almost nothing to do with arm strength. That muscle is mostly responsible for allowing you to bend your arm or flex it towards your shoulder.
the anterior part of the deltoid muscle flexes and medially rotates the humerus/ the arm. to do this it is helped by muscles like coracobrachialis and pectoralis major, corachobrachialis also adduct and flex the arm at shoulder joint.
extensorThe triceps brachii is an extensor. It is the large muscle on the back of the arm and is primarily the muscle used for extension of the elbow joint or straightening of the arm. The triceps is also an antagonist of the biceps and the brachialis muscles.ExtensorsTriceps is not a flexor. It is extensor of the elbow joint.
The biceps brachii muscle is responsible for flexing the humerus. It is a two-headed muscle located in the upper arm that helps in bending the elbow and also plays a role in shoulder flexion when the arm is rotated.
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
The bicep is a muscle on the upper arm that is designed to rotate the forearm and flex the elbow. See link below for more information.
The elbow joints flex to decrease the angle between the forearm and upper arm, allowing for movements like bending the arm or bringing the hand closer to the shoulder. This action is controlled by the biceps muscle, which contracts during flexion.