InvertebratesInvertebrates

InvertebratesInvertebrates

Invertebrates are animals without bonesInvertebrates are animals without bones Some of them have a shell or thick skin, Some of them have a shell or thick skin,

but they don’t have a skeleton insidebut they don’t have a skeleton inside

Types of invertebratesTypes of invertebrates

There are a lot of species of invertebrate There are a lot of species of invertebrate animals (much more than vertebrates) animals (much more than vertebrates)

Some of them have legs: they are Some of them have legs: they are arthropodes arthropodes

Many others don’t have legsMany others don’t have legs

ArthropodesArthropodes

They are invertebrates with legsThey are invertebrates with legs They have a thick skinThey have a thick skin InsectsInsects have got 6 legs have got 6 legs ArachnidsArachnids have got 8 legs have got 8 legs CrustaceansCrustaceans have got 10 legs have got 10 legs MyriapodesMyriapodes have got a lot of legs have got a lot of legs

InsectsInsects They have got six legsThey have got six legs Some have got wings, others haven’t. Some have got wings, others haven’t. Ants, beetles, flies, butterflies, bees and Ants, beetles, flies, butterflies, bees and

wasps are all insects, but there are many wasps are all insects, but there are many moremore

Other arthropodesOther arthropodes

Arachnids (8 legs): spider and scorpionArachnids (8 legs): spider and scorpion Crustaceans (10 legs): crab, lobster…Crustaceans (10 legs): crab, lobster… Myriapods (lots of legs)Myriapods (lots of legs)

MolluscsMolluscs

Molluscs are invertebrates with no legsMolluscs are invertebrates with no legs They have a shell in or outside their bodyThey have a shell in or outside their body

Other invertebratesOther invertebrates There are many more invertebrates without There are many more invertebrates without

shell or legsshell or legs Jellyfish, worms, sea horses, starfish and Jellyfish, worms, sea horses, starfish and

sponges are other species of invertebratessponges are other species of invertebrates