locomotion of bird
DESCRIPTION
locomotion in bird, diagram, and others. Contributed by SAM Bestari,Subang Jaya from teacher MunirahTRANSCRIPT
![Page 1: Locomotion of Bird](https://reader033.vdocument.in/reader033/viewer/2022052307/5529575b550346752e8b4737/html5/thumbnails/1.jpg)
LOCOMOTION OF BIRD
![Page 2: Locomotion of Bird](https://reader033.vdocument.in/reader033/viewer/2022052307/5529575b550346752e8b4737/html5/thumbnails/2.jpg)
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.
![Page 3: Locomotion of Bird](https://reader033.vdocument.in/reader033/viewer/2022052307/5529575b550346752e8b4737/html5/thumbnails/3.jpg)
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.
![Page 4: Locomotion of Bird](https://reader033.vdocument.in/reader033/viewer/2022052307/5529575b550346752e8b4737/html5/thumbnails/4.jpg)
Diagram of Flying Bird
![Page 5: Locomotion of Bird](https://reader033.vdocument.in/reader033/viewer/2022052307/5529575b550346752e8b4737/html5/thumbnails/5.jpg)
THE END