Macro anatomical study of appendicular skeleton of arm region of domestic duck (Anas platyrhynchos domesticus)

Abstract

The present study was conducted on one pair of humerus. Humerus composed of two extremities and shaft. The two extremities were proximal and distal. The proximal extremities contained head, deltoid crest, medial tubercle, lateral tubercle and pneumatic foramen. The head was oval in shape. Deltoid crest was situated laterally and curved in backward direction. A large pneumatic foramen was situated immediately below the medial aspect of medial tubercle. Distal extremities contained medial and lateral condyle. Medial condyle was larger than lateral and it was traversed by grooved. The shaft consists of four surface viz., lateral, medial, cranial and caudal. Lateral surface was smooth and concave whereas medial surface was smooth and convex. The cranial surface was smooth and convex. The caudal surface was wide and concave above and convex below.