The elbow is a synovial hinge joint located between the upper arm and forearm. It is formed by the meeting of three bones: the humerus in the upper arm and the ulna and radius in the lower arm. Like all other hinge joints, the elbow permits movement in one plane, namely the flexion and extension of the forearm relative to the upper arm.  Upper Arm Muscle-Tricep Muscle Anatomy. Often neglected compared to the biceps, the tricep muscle is just as an important muscle group to train for total arm development. Your triceps make up about 2/3 of your upper arm mass-you can't afford to ignore it. The triceps muscle is a large three headed muscle that stretches alongside the back of the upper arm and is also referred to as the triceps brachii Your arm has quite a few muscles, but the ones in your upper arm are the biceps (the one you flex when you make a muscle) and the triceps, which is on the back of the upper … arm. 22 people found this useful.  1 Biceps: This large muscle of the upper arm is formally known as the biceps brachii muscle, and rests on top of the humerus bone. 2  It rotates the forearm and also flexes the elbow. 3  Triceps: This large muscle in the back of the upper arm helps straighten the arm. 4  It is formally known as the triceps brachii muscle. The muscles of the arm that can be seen easily on the surface include: 1  The most famous technique for building arm muscles is the curl, which increases the size of the biceps. Some trainers, however, make fun of this exercise as “curls for the girls” because men often neglect other muscle groups in their rush to build biceps suitable for display in tight T-shirts.  The muscle you're feeling is the triceps. It's a single muscle, but the tri-part of its name refers to the fact that there are three sections, or heads — the lateral, the long, and the medial — that originate at your shoulder blade and upper arm and end just below your elbow. Many women seem to have a love-hate relationship with the biceps: The muscle makes up only a third of the upper arm's size — the triceps accounts for the other two-thirds — but is often blamed for making arms appear bulky. The muscle fibers in the biceps are long, and they run along the length of the upper arm. The muscles of the arm and hand are specifically designed to meet the body’s diverse needs of strength, speed, and precision while completing many complex daily tasks. Activities such as lifting weights or heavy boxes require brute strength from the muscles of the arm. Flexion of the forearm is achieved by a group of three muscles – the brachialis, biceps brachii, and brachioradialis. These flexor muscles are all located on the anterior side of the upper arm and extend from the humerus and scapula to the ulna and radius of the forearm. These bulky muscles also give the arm its strength. The muscles of the arm that can be seen easily on the surface include: 1  Biceps: This large muscle of the upper arm is formally known as the biceps brachii muscle, and rests on top of the humerus bone. 2  It rotates the forearm and also flexes the elbow In human anatomy, the arm is the upper limb of the body, comprising regions between the glenohumeral joint (shoulder joint) and the elbow joint. In common usage the arm extends to the hand. It can be divided into the upper arm (brachium), the forearm (ante brachium), and the hand (manus). Anatomically the shoulder girdle with bones and corresponding muscles is by definition a part of the arm. The Latin term brachium may refer to both the arm as a whole or to the upper arm on its own.  The muscles of the upper arm are responsible for the flexion and extension of the forearm at the elbow joint. Flexion of the forearm is achieved by a group of three muscles – the brachialis, biceps brachii, and brachioradialis. These flexor muscles are all located on the anterior side of the upper arm and extend from the humerus and scapula to the ulna and radius of the forearm.
http://www.innerbody.com/image/musc07.html http://www.bodybuildingforyou.com/exercise-workout/arm-muscle-anatomy.html http://www.answers.com/Q/What_are_arm_muscles_called http://www.healthline.com/human-body-maps/arm-muscles http://www.webmd.com/men/features/strength-training-building-arm-muscles http://www.fitnessmagazine.com/workout/arms/exercises/how-to-tone-arm-muscles/ http://www.innerbody.com/anatomy/muscular/arm-hand http://www.healthline.com/human-body-maps/arm-muscles https://en.wikipedia.org/wiki/Arm http://www.innerbody.com/anatomy/muscular/arm-hand
what % muscle is in your arm