1. Invertebrates

2. What is an invertebrate?
An animal that has no backbone
Most animals in the world are invertebrates
Most invertebrates are smaller than vertebrates.

5. Porifera Aquatic Multicellular Tiny pores all over their bodies
Example:
Sponge
Porifera

6. Cnidaria Aquatic Soft-bodied Stinging tentacles Examples: Hydras
Jellyfish
Sea Anemones
Coral

7. Hydra

8. Jellyfish

9. Sea Anemone

10. Coral

11. Worms No shells No legs No eyes Examples: Earthworms Tapeworms
Sandworms

12. Mollusks May have a hard outer shell, but not always Examples: Snails
Clams
Squid
Octopus
slugs

13. Snail

14. Clams

15. Squid
Squid

16. Octopus

17. Echinoderms Aquatic Spiny-skinned 5-part symmetrical body Examples:
Starfish
Sea Urchin
Sand Dollar
Sea Cucumber

18. Starfish

19. Sea Urchin

20.                                           
Sand Dollar

21. Sea Cucumber

22. Arthropods Jointed legs 2 or more body parts Head Thorax Abdomen
Often have exoskeleton
850,000 species we know of so far!

23. Arachnids Two body parts: Cephalothorax Abdomen 4 pairs of legs
Can regrow legs
8 eyes
Poison glands in jaw
Spinnerets on end of abdomen for webs

24. Don’t get ticked!

25. …or stung by a scorpion!

26. Crustaceans
Head
Thorax
Abdomen
3 pairs of legs
Swimmerets

27. Mmmm…lobster

28.                       
Don’t be crabby!

29. Hey Shrimp!!
Hey Shrimp!

30. Insects
Head
Thorax
Abdomen
6 legs
Compound Eyes

31. Millipedes
Two pairs of legs per segment
Rounded body
Not poisonous

32. Centipedes One pair of legs per segment Flat body
Poison claws behind head
Paralyze prey

33. Aren’t invertebrates fun?