Invertebrates haven't got a backbone
They have three parts: head thorax and abdomen
Molluscs and insects are invertebrates. Some invertebrates have got shells or exoskeletons to protect their soft bodies.
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| The octopus is a mollusc |
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| The ant is an insect (arthropod) |
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| Exoskeleton |
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| Exoskeleton vs shell |
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