Post on 19-Jul-2015
What is classification?
Due to the large number of species of plants and animals, scientist put similar animals in groups. This is called classification.
What are Vertebrates and Invertebrates ?
Vertebrates are animals that have a backbone while invertebrates are animals without a backbone.
Which animals are vertebrates?
These animals include:
Fish
Birds
Reptiles
Amphibians
Mammals
Which animals are invertebrates?
The groups of invertebrates include: jellyfish and sea anemones, flatworms, roundworms, segmented worms, molluscs, starfish and sea urchins and arthropods.
Jellyfish and sea anemones
Jelly-like body.
Have tentacles with stinging cells to catch food.
Flatworms
Flattened body with no segments (divisions).
Roundworms
Long thin body with no segments.
Segmented worms
Long, tube-shaped body made of segments.
Molluscs
Many have a shell.
Body not in segments.
Move around on a muscular foot.
Starfish and sea urchins
5 ‘arms’ or star-shaped pattern on their bodies.
Spiny skins
Arthropods
Jointed legs.
Body has a hard outer skeleton
They can be divided into 4 smaller groups: Crustaceans, Insects, Spiders, Centipedes and millipedes.
Arthrodops: Crustaceans
Chalky outer skeleton.
Most live in water.
Arthropods: Insects
6 legs.
3 parts to the body.
Have wings.
Arthropods: Spiders
8 legs.
2 parts to the body.
No wings
Arthropods: Centipedes and millipedes
Long body made up of segments.
Many legs.