"The Role of Animals in the Biosphere" PPT Courseware 4

Description

"The Role of Animals in the Biosphere" PPT Courseware 4

1 The role of animals in nature

Information 1: In the 1950s and 1960s, sparrows were eradicated.

According to relevant records, Shanghai eliminated 686,172 sparrows and harvested 265,968 sparrow eggs within 5 days.

Now, there is a call to protect sparrows.

Information 2 The main reasons for the increase in hare numbers

Hulunbuir grassland, wolves, people, hares, cattle and sheep

Protect people and livestock, hunt wolves, and increase the number of hares

Rabbits and cattle and sheep compete for pasture, causing grassland degradation.

Maintaining ecological balance plays an important role

ecological balance

The number and proportion of various organisms in the ecosystem are always maintained in a relatively stable state.

There is an interdependent and mutually restrictive relationship between various organisms in food chains and food webs.

Help plants pollinate and spread seeds

Animals help pollinate plants, allowing them to reproduce successfully.

Animals can help plants spread fruits and seeds, helping to expand the distribution range of plants.

The positive role of animals in nature:

1. Important role in maintaining ecological balance

2. Promote the material cycle of the ecosystem

3. Help plants pollinate and spread seeds

The role of organisms in the ecological environment is two-sided

Both beneficial and harmful.

Butterfly larvae harm plants,

Butterflies are one of the main insects that pollinate plants.

From the perspective of the relationship between animals and humans, can you share your views on butterflies?

giraffe

The average height of a giraffe is more than 5 meters, and its neck alone is 2 meters long. When it raises its neck to eat leaves, its head is 2.5 meters higher than its heart.

Giraffes have very big hearts, bigger than a basketball.

When a giraffe is resting, its heart beats 100 times per minute.

Giraffes have very high blood pressure, with the blood pressure of the carotid artery under their head maintaining 26.7kPa, making them the most hypertensive animals on earth.

Another feature of the giraffe circulatory system

The muscles around blood vessels are very developed and can compress blood vessels and control blood flow;

At the same time, the skin and fascia of the giraffe's legs and body are very tight, which is conducive to the upward return of blood in the lower limbs.

The giraffe can transport blood to its head 4 to 5 meters above the ground. Otherwise, it will "bad" due to insufficient oxygen supply to the head.

Keywords: teaching courseware on the role of animals in the biosphere, download PPT courseware for the first volume of biology for eighth graders from People’s Education Edition, download courseware for biology slides for eighth grade, download PPT courseware on the role of animals in the biosphere, .PPT format;

For more information about the PPT courseware "The Role of Animals in the Biosphere", please click the "The Role of Animals in the Biosphere" ppt tag.

"The Role of Animals in the Biosphere" PPT:

"The Role of Animals in the Biosphere" PPT Part 1: Questions to think about: What is the role of green plants in the biosphere? Green plants can use light energy through chloroplasts to synthesize inorganic substances into organic substances that store energy. They are producers in the biosphere. animals in...

"The Role of Animals in the Biosphere" PPT Courseware 8:

"The Role of Animals in the Biosphere" PPT Courseware 8 Exploration 1: We know that green plants support other organisms on the earth! Why are animals also an important component of the ecosystem? What role does it play in the natural ecosystem? Information 1: Sparrows peck and destroy...

"The Role of Animals in the Biosphere" PPT Courseware 7:

"The Role of Animals in the Biosphere" PPT courseware 7 Scanning test points 1. The composition of the mammalian movement system 2. The characteristics of animals suitable for movement and the realization of movement 3. Characteristics of animal behavior, comparison of similarities and differences between innate behavior and learned behavior; Characteristics of social behavior 4. Movement..

File Info

Update Time: 2024-11-21

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

Preview