"Birds" Main Groups of Animals PPT Courseware 2

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"Birds" Main Groups of Animals PPT Courseware 2

Some birds can fly back and forth between the southern and northern hemispheres, and some can fly over Mount Everest! Why do they have such strong flying abilities? Maybe you will answer: Because birds have wings. So, why can’t people fly like birds even if they have artificial wings attached to their arms?

learning target

1. Compare the similarities and differences in morphological structure of different birds.

2. Outline the main characteristics of birds.

3. Understand the relationship between birds and human life.

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?

Tips: The body surface is covered with feathers, and the forelimbs become wings; it has a beak but no teeth.

Explore topic 2

Main characteristics of birds

Morphological and structural characteristics of birds suitable for flight

What does the bird look like? Tip: Streamline.

How does it help birds fly? Tip: Reduce air resistance during flight.

1. External form

(1) The body is streamlined - reducing air resistance during flight

(2) Body surface covered with feathers——insulation and protection

(3) The forelimbs become wings—suitable for fanning the air

2. Chest muscles

Where do birds have the most developed muscles?

Tip: pecs.

What is the relationship between the muscle characteristics of a bird and the flight movement of its wings?

Tip: Only well-developed chest muscles can move the wings to facilitate flight.

3. Bones

What are the characteristics of a bird's sternum?

Tip: There is a keel process.

Thinking about it in relation to the muscles attached to this bone (such as the pectoral muscles), what is the function of this feature?

Tip: It is helpful for developing chest muscles.

Class summary

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 that can fly;

3. Muscles: well-developed chest muscles;

4. Bones: light, thin, with keel protrusions and hollow long bones;

5. Digestive system: well-developed, large food intake, strong digestive ability; rapid excretion of feces;

6. Circulation system: perfect structure, strong function of transporting nutrients and oxygen;

7. Respiratory system: It has unique air sacs that can assist the lungs in breathing.

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

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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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Update Time: 2024-07-05

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 1 industry PPT template

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