"Birds" PPT courseware on the main groups of animals

Description

"Birds" PPT courseware on the main groups of animals

teaching objectives

1. Outline the main characteristics of birds.

2. Try to explain the concepts of endotherms and ectotherms.

3. Establish the viewpoint that the bird's body structure and function are unified and that the bird is adapted to the environment.

4. Give examples to illustrate the relationship between birds and human life, and form a sense of loving and protecting birds.

1. Get to know the various white birds

(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.

Main characteristics of birds

1. Characteristics of birds suitable for flying

(1) Birds’ bodies are ______-shaped, which can reduce resistance during flight

(2) The body surface is covered with ______, the forelimbs become ______, and the feathers are arranged in a ______ shape, which is conducive to smooth flying and gliding.

(3) The bones of birds are ______ strong and flexible. The ______ bones are well developed and are helpful for attaching the pectoral muscles. ______ is hollow and filled with air, which can reduce the weight of flying.

(4) ______ muscles are well developed and generate strong power, pulling the wings to fly powerfully.

2. Birds have developed vision

3. Characteristics of the digestive system of birds

1. The rectum of birds is ______, which is not conducive to storing feces and is conducive to weight loss.

2. Birds’ food intake is ______ and their digestion capacity is ____.

The airbag assists the lungs in breathing, improves the efficiency of gas exchange, and meets the need for oxygen during flight. At the same time, the air bag can reduce the body's specific gravity; it is helpful to reduce friction between internal organs and dissipate body heat.

Double breathing - when inhaling, part of the air enters the front air sac after gas exchange in the lungs, and the other part of the air passes through the bronchi and directly enters the posterior air sac. When exhaling, the air in the front air sac is exhaled directly, and the air in the rear air sac is exhaled through the lungs, and gas exchange occurs in the lungs. In this way, during one breath, gas exchange occurs twice in the lungs, so it is called double breathing.

Endotherms and ectotherms

Animals whose body temperature does not change with changes in ambient temperature are endothermic animals. Such as birds and mammals.

Animals whose body temperature changes with changes in ambient temperature are ectotherms. Such as fish, amphibians, and reptiles.

The meaning of constant body temperature

A constant body temperature enhances the ability of animals to adapt to the environment and expands their distribution range.

3. The relationship between birds and humans

1. Some can help humans eliminate agricultural and forestry pests

2. Some can provide animal protein for humans

3. Enrich human cultural life

4. Enrich human cultural life

Classroom training

1. Which of the following flying animals is not a bird ( )

A. Domestic pigeon B. Barn swallow C. Bat D. Sparrow

2. The honey syrup a hummingbird eats in a day is about twice its body weight. The characteristics of hummingbirds’ feeding and digestion are ( )

A. Small food intake and poor digestion ability

B. Small food intake and strong digestion ability

C. Large food intake and poor digestion ability

D. Large appetite and strong digestion ability

3. The following statements about the function of bird air sacs are incorrect ( )

A. Carry out gas exchange

B. Increase heat dissipation

C. Assist in completing double breathing

D. Reduce friction between internal organs

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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: 2024-10-04

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

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