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Biology F5 (locomotion & support)
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Locomotion in a bird
By: Khadeeja, Fatimah Amira, Sajidah, Asma Athirah, Fatin Aisyah, Syahirah….
Special characteristics of Bird
• Its wing is aerofoil in shape
• It has pectoralis minor muscles and pectoralis major muscles
• These muscles are antagonistic muscles
• These muscles extend from sternum to 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 (downstroke)
• The wings which move up and down rhythmically generate the forward thrust as well as provide the lift for the flying bird
Structure of a Bird
Diagram of a Flying Bird
THE ENDThank you for your
attention.
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