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ANIMALS
EXAM REVIEW
ANIMALS CLASSIFICATION
Animals are classified according to different characteristics: What they eat: carnivorous, herbivorous or
omnivorous.
Where they live: terrestrial or aquatic.
How they interact with humans: wild or domestic.
The way they are born: oviparous or viviparous. If they have internal skeleton or not:
invertebrate or vertebrate.
CARNIVOROUS ANIMALS
They eat other animals. These are some carnivorous animals:
HERBIVOROUS ANIMALS
They eat plants: roots, stems, leaves, flowers, fruits... These are some herbivorus animals:
OMNIVOROUS ANIMALS
They eat other animals and plants. These are some omnivorous animals:
TERRESTRIAL ANIMALS
They mainly live on land. Sometimes they can get into water.
They can move in different ways and use different body parts: Walking (legs) Flying (wings) Crawling/ sliding (body)
AQUATIC ANIMALSThey live in water.
They use their tails, fins or tentacles to swim.
Some of them don’t swim.
WILD ANIMALSThey live freely in their natural environment.
DOMESTIC ANIMALSThey live with humans: Keep us company Help us at work Give us food
VIVIPAROUS ANIMALS
They are born from their mother’s womb.
After being born, the babies drink milk from their mothers.
OVIPAROUS ANIMALS
They are born from eggs.
Some of them incubate their eggs after laying them, they keep them warm.
VERTEBRATE ANIMALS
They have got an internal skeleton.
They have got different body parts: Head Trunk: where the backbone and ribs are Tail: an extension of the backbone. Limbs: some animals have got legs or
arms or fins or wings. Some haven’t got limbs.
VERTEBRATE ANIMALS
They are divided into 5 groups: Mammals Birds Reptiles Amphibians Fish
VERTEBRATE ANIMALS
MAMMALS
Most of them are viviparous.
They drink their mother’s milk when they are born.
They are warm-blooded animals.
They have got 4 limbs.
They breathe through lungs.
Can be aquatic or terrestrial.
Some of them can fly.
Most of them are covered by hair.
VERTEBRATE ANIMALS
MAMMALS
These are some mammals:
VERTEBRATE ANIMALS
BIRDS
They are oviparous. They incubate eggs in nests.
They are covered by feathers.
They are warm-blooded animals.
They have got wings.
Not all of them can fly.
They have got a beak.
They breathe through lungs.
Some of them live in water and on land.
VERTEBRATE ANIMALS
BIRDS
These are some birds:
VERTEBRATE ANIMALS
REPTILES
They are oviparous.
They are covered by scales.
They are cold-blooded animals.
Some of them have got legs and some of them haven’t.
They can walk, swim or crawl.
They breathe through lungs.
VERTEBRATE ANIMALS
REPTILES
These are some reptiles:
VERTEBRATE ANIMALS
AMPHIBIANS
They are oviparous.
They have got damp skin.
They are cold-blooded animals.
They live in water and on land.
They breathe through lungs and their skin.
They eat insects and small animals.
They swim, walk or skip.
VERTEBRATE ANIMALS
AMPHIBIANS
Since they go out of the egg until they become adults, amphibians go through a process called metamorphosis.
VERTEBRATE ANIMALSAMPHIBIANS
These are some amphibians:
VERTEBRATE ANIMALS
FISH
They are oviparous.
They are covered by scales.
They are cold-blooded animals.
They live in water.
They breathe through gills.
They swim with their fins and tails.
VERTEBRATE ANIMALS
FISH
These are some fish:
INVERTEBRATE ANIMALS
They have not got an internal skeleton.
Most of them have got something to protect their body: Exoskeleton. Shell. Anything.
There are different types of invertebrate animals: Arthropodes. Mollusks
INVERTEBRATE ANIMALS
ARTHROPODESThey are the most numerous animals on Earth.They are covered by an exoskeleton. They are classified into:
Insects Arachnids Crustaceans
INVERTEBRATE ANIMALS
ARTHROPODES Insects:
Have got 6 legs. Have got 3 body parts: head,
thorax and abdomen. Have got antennae. Some of them have got wings. Most insects go through the
metamorphosis process.
INVERTEBRATE ANIMALSMETAMORPHOSIS
INVERTEBRATE ANIMALS
ARTHROPODES Insects:
These are some insects:
INVERTEBRATE ANIMALS
ARTHROPODES Arachnids:
Have got 8 legs. Have got 2 body parts:
cephalothorax and abdomen. Haven’t got antennae. Haven’t got wings.
INVERTEBRATE ANIMALS
ARTHROPODES Crustaceans:
Most of them are aquatic and breathe through gills.
INVERTEBRATE ANIMALS
MOLLUSKSThey are soft-bodied animals, usually protected by a shell.
