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"Birds" Main groups of animals PPT courseware 4
learning target
1. Outline the main characteristics of birds.
2. Discuss the concepts of endotherms and ectotherms.
3. Give examples of the relationship between birds and human life, and form a sense of loving and protecting birds.
Explore the topic 1
Discussion (1) Try to complete the table below.
(2) Try to guess what is the connection between the characteristics of the bird's beak and the bird's feeding habits, and what is the connection between the characteristics of the bird's feet and the bird's living environment?
Tip: Birds have different beak shapes, all adapted to their feeding habits. The different foot characteristics of birds are also adapted to their living environment.
(3) What do birds have in common in their external appearance?
Hint: It has a beak but no teeth, its body is covered with feathers, and its forelimbs turn into wings.
Explore topic 2
Morphological and structural characteristics of birds suitable for flight
What does the bird look like? Tip: Streamline.
What does it have to do with the flight life of a bird? Tip: Reduce air resistance during flight.
Main characteristics of birds
1. Body shape: streamlined, which can reduce air resistance during flight;
2. Body surface: covered with feathers, and the forelimbs become wings;
3. Muscles: well-developed chest muscles;
4. Bones: light, thin, strong, long bones are hollow and have keel processes;
5. Digestive system: well-developed, large food intake, strong digestive ability; rapid defecation;
6. Respiratory system: There are unique air sacs to assist the lungs in breathing;
7. Circulatory system: perfect structure, fast heartbeat, and strong function of transporting nutrients and oxygen;
Standard training
1. Which statement about pigeon airbags is incorrect ( )
A. Air sacs are located between internal organs, and some protrude into bone cavities.
B． Air bags enable gas exchange
C. Airbags reduce pigeon weight
D. Airbags can dissipate heat and cool down
2. The most developed muscle of a bird is ( )
A. Neck muscles B. Chest muscles
C. Limb muscles D. Head muscles
3. "Two orioles sing in the green willows, and a row of egrets ascend to the blue sky." The animals written in the poem belong to ( )
A.Bird B.Mammal
C. Annelida D. Arthropod
4. Flying makes the bird ( )
A. Expanded the range of activities B. Conducive to foraging
C. Conducive to the reproduction of offspring D. All of the above are true
5. Birds consume a lot of energy to fly. Among the following descriptions, the ones that have nothing to do with providing energy are ( )
A. Birds have a large food intake and strong digestion capabilities
B． Birds breathe vigorously and have strong oxygen supply capacity
C. The bird's chest muscles are well developed and can contract powerfully.
D. Birds have high body temperatures and developed circulatory systems
Birds are important members of the biosphere, an important factor in maintaining the stability of ecosystems, and important partners for human survival and development.
It is everyone’s responsibility to love and protect birds!
Birds are closely related to humans!
Birds, messengers of beautiful nature!
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For more information about the PPT courseware "Main Groups of Birds and Animals", please click the "Main Groups of Birds ppt Animals" ppt tab.
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