Scapula bone: Located above the back

Located above the back, the scapula assists with shoulder motion and joins the clavicle to the upper arm. Learn more about the scapula 's anatomy , function, and conditions that affect it. Scapula is a triangular, flat bone , lying in the upper back that connects the clavicle to the humerus. The scapula , commonly known as the shoulder blade , is a flat, triangular-shaped bone that provides a vital part of the shoulder girdle. It serves as an attachment site for several muscles that facilitate the shoulder's complex movements. Structurally, it features a body, two processes (the acromion and the coracoid process), and a glenoid cavity, which articulates with the humerus to form the shoulder joint. The scapula is also known as the shoulder blade . It articulates with the humerus at the glenohumeral joint, and with the clavicle at the acromioclavicular joint. In doing so, the scapula connects the upper limb to the trunk.