What is an invertebrate?
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Explainer Video
Tutor: Jasmine
Summary
What is an invertebrate?
In a nutshell
Invertebrates are animals without a backbone. They can be further divided into three groups that share similar characteristics: insects, arachnids and molluscs.
| | key characteristics | examples |
| Insects | Six legs and three body parts. | Butterflies, beetles, ants and houseflies. |
| Arachnids | Eight legs and two body parts. | Scorpions and spiders. |
| Molluscs | Slimy foot and sometimes have a shell. | Snails, slugs and squids. |
Classification key
Classification keys can help identify animals. The below classification key can be used to identify the three groups of invertebrates.
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FAQs - Frequently Asked Questions
What is an invertebrate?
An invertebrate is an animal without a backbone.
What are the three types of invertebrate?
The three types of invertebrate are insect, arachnid and mollusc.
What do classification keys help with?
Classification keys can help identify animals.