The muscles in your arms are bicep or tricep. Your Bicep muscle is the above part of your arm and your Tricep muscle is the under part of your arm. So tricep
The upper arm is primarily composed of skeletal muscle. Specifically, muscles such as the biceps brachii and triceps brachii are responsible for movement and stability in the upper arm. These muscles are attached to the bones by tendons and are under voluntary control.
The triceps brachii is a muscle with three attachments.
There is not a single muscle that rotates the upper arm. The name of the muscle that contributes in rotation of the upper arm is deltoid muscle.
The brachialis is a muscle in the upper arm that flexes the elbow joint.
What are the tendon in your arm?
no
I think you are referring to the triceps. This is the muscle that attaches at the elbow and the shoulder. The one that you use when extending your arm. biceps; up triceps; under
Deltoid
where you bored when you posted this question or have you pop you muscle in you left arm
Biceps or triceps
which shoulder muscle allows you to adduct your arm
The posterior deltoid is one extensor of the upper arm.