Caption Major changes of the coracoid and scapula (main components of the shoulder girdle) across the major vertebrate groups; the right is a simplified cladogram shows the phylogeny of Mesozoic birds ...

Coues, William Pearce — Former Instructor in Surgery, Tufts College Medical School. For record and address of author see "This Week's Issue," page 742.

The scapula or shoulder blade is a bony structure found on the upper back that connects the upper arm to the chest wall (thorax). It also forms the socket part of the shoulder joint connecting the ...

Coues, William Pearce — Former Instructor in Surgery, Tufts College Medical School. For record and address of author see "This Week's Issue," page 742. Copying failed.