Shoulder joint structure
The shoulder joint is the most mobile joint in the human body, consisting of three bones: the humerus, scapula, and clavicle. Each bone meets to form a joint, which is the main joint of the joint and the upper joint and the scapular joint. This joint is commonly called the shoulder joint because most joint movements occur in the joints and the upper-arm joints.
The cartilage covers the contact surface between the upper arm bone and the joint that forms of the shoulder joint. The joint is surrounded by a soft tissue called the joint sequence, which is connected to each other and wraps around the shoulder joint to keep the joint intact. Outside, the four muscles that rotate the arms and the tendons surround each, and the muscles connected to the chest, back, neck, etc. are located at the outermost point.