2. Invertebrates
Invertebrates are animals without bones
Some of them have a shell or thick skin,
but they don’t have a skeleton inside
3. Types of invertebrates
There are a lot of species of invertebrate
animals (much more than vertebrates)
Some of them have legs: they are
arthropodes
Many others don’t have legs
4. Arthropodes
They are invertebrates with legs
They have a thick skin
Insects have got 6 legs
Arachnids have got 8 legs
Crustaceans have got 10 legs
Myriapodes have got a lot of legs
5. Insects
They have got six legs
Some have got wings, others haven’t.
Ants, beetles, flies, butterflies, bees and
wasps are all insects, but there are many
more
6. Other arthropodes
Arachnids (8 legs): spider and scorpion
Crustaceans (10 legs): crab, lobster…
Myriapods (lots of legs)
7. Molluscs
Molluscs are invertebrates with no legs
They have a shell in or outside their body
8. Other invertebrates
There are many more invertebrates without
shell or legs
Jellyfish, worms, sea horses, starfish and
sponges are other species of invertebrates