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locomotion in bird, diagram, and others. Contributed by SAM Bestari,Subang Jaya from teacher Munirah
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LOCOMOTION OF BIRD
Special Characteristic of Bird
• Its wing is aerofoil in shape.
• It has pectoralis major muscles & pectoralis minor muscles.
• These muscles are antagonistic muscles.
• These muscles extend from sternum to the humerus.
How Birds Fly?
• When the pectoralis minor muscles contract, the wings are pulled up (upstroke).
• When the pectoralis major muscles contract, the wings are pulled down (down stroke).
• The wings which move up and down rhythmically generate the forward thrust as well as provide the lift for the flying bird.
Diagram of Flying Bird
THE END
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