"Main Groups of Animals" PPT download

Description

"Main Groups of Animals" PPT download

Part One: Scenario Introduction

Please observe carefully and tell us what kind of animals they are? What are their common characteristics?

learning target

1. Understand the main groups of vertebrates and their evolutionary trends.

2. Master the main characteristics of fish and amphibians, and understand their relationship with humans.

3. Through learning about the relationship between different groups of animals and humans, the emotion of loving and protecting animals can be further strengthened.

PPT on the main groups of animals, part 2: animal classification

vertebrate

Vertebrates have two main characteristics:

1. It has a developed nervous system, which differentiates into a brain with a complex structure, and sensory organs begin to appear on the head. The sensory organs, plus the skull that protects them, form an obvious head.

2. They all have a spine in their body, which is where the name vertebrate comes from.

Fish (class Fish)

Fish are temperature-changing aquatic vertebrates that are covered with scales, breathe through gills, use fins as locomotion organs, and feed with upper and lower jaws. They have a wide distribution range and a wide variety of species. They are the most diverse group of vertebrates, including bony fish and Two major categories of cartilaginous fish. Fishes living in the ocean account for 58.2%, and fishes living in fresh water account for 41.2%; they also have a wide range of adaptation to water temperature.

1. Classification of fish

2. Main characteristics of fish

Lives in water throughout life;

Most of the body surface is covered with scales;

Use gills to breathe and fins to swim;

The heart has one atrium and one ventricle.

3. The relationship between fish and humans

for human consumption;

Provide a variety of industrial raw materials;

Swallow mosquito larvae to prevent diseases;

Watch.

Amphibians (Class Amphibians)

Amphibians are also a well-known type of animal. They are a transitional type from aquatic to terrestrial in the evolutionary history of vertebrates. Adults can adapt to life on land, but reproduction and larval development are still inseparable from water.

1. Common amphibians

2. Main characteristics of amphibians

(1) Metamorphosis, the larvae live in water and breathe with gills; most adults live on land, and a few species of adults live in water and generally breathe with lungs;

(2) Exposed skin can secrete mucus and assist breathing;

(3) The heart has two atria and one ventricle;

(4) Body temperature is not constant.

3. The relationship between amphibians and humans

(1) Eliminate farmland pests

(2) Available for consumption

(3) Can be used for medicinal purposes

(4) Good experimental materials for teaching and scientific research

PPT on the main groups of animals, part three: training to meet standards

1. Among the following groups of animals, the ones that all use gills to breathe are ().

A. River clam, shark, seahorse B. Whale, snake, mullet

C. Frog, herring, tadpole D. Pearl clam, crucian carp, turtle

2. Frogs are called amphibians because ( ).

A. Can jump on land and swim in water

B． Can only live near water

C. Adults can live on land, larvae must live in water

D. The skin is exposed and rich in blood vessels

Keywords: Free download of Biology PPT courseware for the second volume of the eighth grade edition of Beijing Normal University, PPT courseware on the main groups of animals, .PPT format;

For more information about the "Diversity of Species and Main Groups of Animals" PPT courseware, please click the "Diversity of Species ppt and Main Groups of Animals" ppt tag.

"Main Groups of Animals" PPT courseware download:

"Main Groups of Animals" PPT courseware download Part 1: Scenario introduction Everyone observe carefully, please tell what kind of animals they are? What are their common characteristics? Learning objectives 1. Learn about common species of reptiles, birds, and mammals and master them...

"Main Groups of Animals" PPT courseware:

"Main Groups of Animals" PPT courseware Part One: Scenario Introduction Everyone observe carefully, please tell what kind of animals they are? What are their common characteristics? Learning objectives 1. Understand common segments, soft bodies, arthropods and echinoderms and their main characteristics. 2...

"Main Groups of Animals" PPT:

"Main Groups of Animals" PPT Part One Content: Scenario Introduction Animals in nature are of all kinds, diverse, and have vastly different shapes. Approximately how many species are known so far? What animal do you know has the most variety? What is the largest animal? Minimum..

File Info

Update Time: 2024-09-07

This template belongs to biology courseware Beijing Normal University Edition Eighth Grade Biology Volume 2 industry PPT template

Preview