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"Flying Elf" Various Animal PPT Courseware 3
The body is covered with feathers: for insulation and flight.
The forelimbs become wings: fan-like shapes adapted to fan the air.
The feathers that play a major role in bird flight are ( ), and the down jackets we wear are filled with ( ).
Little information:
There are more than 9,000 species of birds in the world, and my country has 1,186 species, accounting for 13%
Far The record of the farthest flight: a homing pigeon flew for 55 days, covering a distance of about 10,000 kilometers
Fast domestic pigeon fastest record: 177km/h (about 49.2m/s)
High Small birds: average about 200 meters
Larger birds: up to 500 meters
Why are birds suitable for flying?
Characteristics of birds that make them suitable for flight:
1. The forelimbs become wings and use the buoyancy of the air as paddles to propel forward.
2. Light body (with keel protrusion, the bones are light, thin and strong; the bones are hollow with air inside.)
3. Birds have strong digestive power and the digestion process is very rapid.
4. The bird’s body shape is streamlined, which can reduce resistance
Developed chest muscles—provide powerful power for flapping wings
5. The chest muscles and keel spurs are developed and suitable for completing flying movements.
6. The bones are light and thin, and the long bones are hollow to reduce the body's specific gravity.
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"Flying Elf" Various Animals PPT Courseware 2:
"Flying Elf" Various Animal PPT Courseware 2 Why can birds fly freely? Because it has wings. Are all birds with wings? What animals can the students name that can fly but are not birds? Discussion and exchange: The wings of three animals..
"Flying Elf" various animal PPT courseware:
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