This document summarizes different groups of invertebrates. It describes that invertebrates can live in water, on land, or fly. Some have shells or exoskeletons, while others have soft bodies. The document then focuses on three main groups: molluscs which have a soft muscular body and many live in the sea; arthropods which is the largest group including insects, spiders and those with segmented bodies and legs; and worms which have long soft bodies and can live on land or in water.

2. INVERTEBRATE
GROUPS

3. There are many different groups
of invertebrates.

4. Some invertebrates, such as jellyfish,
live in water.

5. Others, such as earthworms, live on land.

6. Some, such as mosquitoes, can fly.

7. Some invertebrates have a shell
to protect their bodies.
shell
oystersnail

8. Some invertebrates have an exoskeleton.
exoskeleton
crab cockroach

9. Some invertebrates don’t have any protection.
They have a soft body.
soft body
cartepillars worms

10. molluscs arthropods worms
Here are 3 groups of invertebrates:

11. MOLLUSCS

12. slug
Molluscs have a soft, muscular body.

13. Many molluscs live in the sea.
mussels oysters

14. ARTHROPODS

15. The biggest group of invertebrates
are the arthropods.

16. Their bodies have 3 parts.
head
thorax
abdomen

17. Many of them have antennae
and some have wings, too.
wings
antennae

18. Insects are arthropods.
beetle bee

19. Spiders and scorpions are arthropods.
spiders scorpions

20. Some arthropods, such as insects,
have 6 legs.
6 legs

21. 8 legs
Others, such as spiders, have 8 legs.

22. There are arthropods with
more than 100 legs.

23. WORMS

24. Worms have a long, soft body.

25. Some live on land.

26. Others live in water.

27. Some worms are parasites.
leech flatworm