Scapula shoulder Image: Scapula Spine (of the scapula) high ridge Image: Spine (of the scapula) Acromion (of the scapula) large flattened head on the end of the spine Image: Acromion (of the scapula) Glenoid cavity (of the scapula) shoulder socket Image: Glenoid cavity (of the scapula) Clavicle collerbone Image: Clavicle Humerus Upper arm bone Image: Humerus Head of the Humerus Proximal end Image: Head of the Humerus Greater tubercle (of the humerus) Large rough portion opposite head