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Invertebrates

Invertebrates. What is an invertebrate?. An animal that has no backbone Most animals in the world are invertebrates Most invertebrates are smaller than vertebrates. Porifera. Aquatic Multicellular Tiny pores all over their bodies Example: Sponge. Cnidaria. Aquatic Soft-bodied

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Invertebrates

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  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.

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

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

  5. Hydra

  6. Jellyfish

  7. Sea Anemone

  8. Coral

  9. Worms • No shells • No legs • No eyes • Examples: • Earthworms • Tapeworms • Sandworms

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

  11. Snail

  12. Clams

  13. Squid Squid

  14. Octopus

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

  16. Starfish

  17. Sea Urchin

  18. Sand Dollar

  19. Sea Cucumber

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

  21. 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

  22. Don’t get ticked!

  23. …or stung by a scorpion!

  24. Crustaceans • Head • Thorax • Abdomen • 3 pairs of legs • Swimmerets

  25. Mmmm…lobster

  26. Don’t be crabby!

  27. Hey Shrimp!! Hey Shrimp!

  28. Insects • Head • Thorax • Abdomen • 6 legs • Compound Eyes

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

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

  31. Aren’t invertebrates fun?

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