the left commonn carotid artery
I think it is called the sub clavian artery.
the shoulder muscle extends the arm
Their Aorta separated from their heart
The human body part located under the shoulder area is the upper arm. It extends from the shoulder to the elbow and contains muscles, bones, and joints that allow for movement and flexibility in the arm.
The aorta branches out and what ends up going into the arm are the brachial (and radial, etc) arteries.
The humerous is a single large bone that extends from the elbow to the shoulder. It is sometimes called the 'funny bone' , because when struck in a certain way you can have a 'funny' nerve tingling sensation. Humour/ funny.
A shoulder spica cast is typically a type of body cast that immobilizes the shoulder joint and part of the arm. It is used to stabilize fractures or dislocations in the shoulder region. The cast extends from the chest down to the hand on the affected side.
aorta
There are actually more than 4 muscles that should be immobilized. When you move your shoulders you move your clavicle. The muscles that causes movement at the shoulder joint should be immobilized. This includes the prime movers, as well as the assistant movers. The following muscles should be immobile. The subclavius which moves and depresses the clavicle as well as helps stabilize the pectoral girdle. The pectoralis minorabduct the scapula and rotates it downward, lowering your shoulders. The serratus anterior abducts the scapula and cause it to rotate upward, shrugging your shoulders. The trapezius stabilizes the scapula as well as move it, and helps extend head. The levator scapulae elevates the scapula and rotates it downward. The rhomboid majorelevates, adducts, rotates downward, and stabilizes the scapula. The Rhomboid minor does the same thing as the Rhomboid major. The pectoralis major adducts and medially rotates the arm at the shoulder joint; flexes arm at the clavicular head and extends the arm to the side of the trunk at the sternocostal head. The deltoid abducts the arm at the shoulder joint; flex and medially rotates the arm at shoulder joint; and extend and laterally rotates the arm at shoulder joint. The subscapularis medially rotates the arm at shoulder joint. The supraspinatus assists the deltoid muscle to abduct the arm at the should joint. The infraspinatuslaterally rotates and abducts the arm at the shoulder joint. The teres major extends the arm at the shoulder joint and assists in the adduction and medial rotation of the arm at the shoulder joint. The teres minor laterally rotates, extends, and adducts the arm at the shoulder joint. The coracobrachialis flexes and adducts the arm at the should joint.
The posterior deltoid is one extensor of the upper arm.
The humerus is the bone of the upper arm, not the lower arm/forearm.
The trapezius muscle extends from the upper back to the back of the neck. Its main functions are to support the arm and to move the shoulder blade.