Pigeon : Pectoral girdle with sternum

• Pectoral girdle is peculiarly inverted L – shaped and it is composed of coracoid, scapula and clavicle.

CORACOID

• It is a large, stout and rod – shaped bone.

• Distal end is produced into a hook – like acro – coracoid process while proximal end is flattened to articulate with coracoid groove on the antero – lateral border of sternum.

• Below acro – coracoid process, the inner surface of coracoid articulates with scapula while outer surface contain cup shaped glenoid cavity for humerus head.

SCAPULA

• It is a sobre like bone.

• Anteriorly it contains cup shaped depressions forming part of glenoid cavity and on the inner side, it has an acromion process.

CLAVICLE

• They fuse to form ‘V’ – shaped furcula.

• Each clavicle is rod - shaped bone.

• Ventrally both clavicles unite to form interclavicle.