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UNIT 3. INVERTEBRATES ANIMALS UNIT 3. INVERTEBRATES ANIMALS

UNIT 3. INVERTEBRATES ANIMALS

PASAPALABRA

SPONGES

WORMS

CNIDARIANS

MOLLUSCS

ECHINODERMS


ARTHROPODS


1. Insects


2. Arachnids


3. Crustaceans


4. Myriapods

UNIT 3: ANIMALS UNIT 3: ANIMALS

UNIT 3: ANIMALS

Life makes the Blue Planet a precious and unique planet. Animals and plants are living things.

  

Did you know that there are 8.7 million of species of animals on the world?

Did you know that about 97% of the animals on Earth are invertebrates and only the 3% are vertebrates?

I. VERTEBRATE  ANIMALS

 A) CLASSIFICATION & MAIN CHARACTERISTICS OF VERTEBRATES

    You can see the classification of vertebrate animals as well as the main characteristics of each big group in the next link.

 

1. MAMMALS

    In the next video you can see very beatiful images of several mammals. You can learn about different groups of mammals and their nutrition, breathing and reproduction here.

 There are many different groups of mammals. In the next web site you can get interesting information about each group of mammals, as well as about specific mammals. What if your favourite mammal?

2. BIRDS

  Watch the beautiful birds on next video. You will learn interesting things about birds, their nutrition, respiration and reproduction.

    Click on this web site link to see the main groups of birds. You will also learn interesting information about each group, as well as about specific birds. 

3. REPTILES

    Watch next video with real images of reptiles, you will learn many interesting things about reptiles, as well as about their nutrition, breathing and reproduction.

  Clik here to learn more about different groups of reptiles, as well as about intividual ones.

4. FISH

                     

Click here to know more interesting things about fish.

5. AMPHIBIANS

Click here to know more about amphibians.

B)  THE VITAL FUNCTIONS OF VERTEBRATES


                      Click here to watch this video in full screen (BIG)

1. VERTEBRATES NUTRITION



RUMINANTS are mammal herbivores that have got a special stomach with 4 chambers (parts). Have a look at the following 2 videos and you will learn more about their digestion process. Steps:
1. First they eat grass and swallow it fast to the stomach.
2. Later on the partly digested food comes back from the stomach to the mouth again.
3. They chew it again, but now slowlier.
4. They sallow it again for the 2nd time.
5. The digestion continues again in the stomach.
Video Ruminats 1
Video ruminants 2

2. VERTEBRATES RESPIRATION

a) THROUGH LUNGS

b) THROUGH  GILLS (Fish)

c) AMPHIBIANS RESPIRATION

3. VERTEBRATES REPRODUCTION

To know more about vertebrate reproduction click on the next web site.


 II. INVERTEBRATE   ANIMALS

 

 

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Some ANIMALS IN DANGER OF EXTINCTION

There are many animals and plants in danger of extinction in the world....

Unlikely some especies have already deseapered, so they are totally extincted...

This is happening every year for many different reasons...

Some of the most important reasons for living things to go into danger of extinction are:

1. The climate change (global warming, drought, fires, ....)

2. Contamination of water bodies or land areas, pollution of the air...

3. The human expansion over the natural habitat of each especies, which produces a conflict between some living things and the humans, and reduces the natural habitat or area where they can live.

(Many animals are killed by cars on roads,...)

Advertising traffic signal on road that crosses a natural habitat where animals in danger of extinction live.

Killed Iberian linx by a car on a road.

 4. Overexplotaion of plants or animal hunting. 

The Iberian wolf has been hunted by people for centuries.

VIDEO

5. The introduction of some plants or animals from different ecosystems, countries or continents is very dangerous, because some of the new especies compete with the original, native ones for the same resources, food, areas to live...

6. Some animals can´t find the normal food they usually at(due to the previous reasons).

 (Eating a rich variety of food, protects animals more.  But some carnivores or herbivores animals´ diet depends a lot on only one or a few especies. So if those food provider especies are reduced.... the consumer has also got a serious problem for surviving.

   Example The giant panda bear eat up to a 98% of bambu, so panda bears are in danger of extinction because bambu forests have been also reduced by the human effect....

   Up to the 80% of the iberian linx´s diet consists on rabbits. So when a lot or rabbits have died to a big and serious rabbits illness, linxes had a lot of problem to eat them. Well The iberian linx has also problems with the human explasion, they are killed by cards on roads, and some people have done illegal hunting of them...

7. Some animals reproduce very slowly, so if there are not many it is more difficult for them to recover.

Iberian Imperial eagle defending its nest from a fox.

 

Iberian Imperial eagle with offpring in its nest.

 

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LICENCIA CREATIVE COMMONS