1. Lesson 1 – Animals without a Backbone
Vocabulary words:
invertebrate- an animal without a backbone

2. Lesson 1 – Animals without a Backbone
Vocabulary words:
sponge- a simple invertebrate that has a hollow body with a single opening and lives in water

3. Lesson 1 – Animals without a Backbone
Vocabulary words:
cnidarian- an invertebrate with stinging cells on the ends of tentacles.

4. Lesson 1 – Animals without a Backbone
Vocabulary words:
mollusk- an invertebrate that has a soft body and a shell

5. Lesson 1 – Animals without a Backbone
Vocabulary words:
echinoderm- a spiny skinned invertebrate

6. Lesson 1 – Animals without a Backbone
Vocabulary words:
endoskeleton- an internal supporting structure

7. Lesson 1 – Animals without a Backbone
Vocabulary words:
arthropod- an invertebrate with jointed legs, a body that is divided into sections, and an exoskeleton

8. Lesson 1 – Animals without a Backbone
Vocabulary words:
exoskeleton- a hard covering that protects the bodies of some invertebrates

9. Lesson 1 – Animals without a Backbone
How do animals differ?
1. Symmetry- some animals have symmetry while others do not.

10. Lesson 1 – Animals without a Backbone
Backbone or no backbone- 95% of all animals do not have a backbone (they are invertebrates).

11. Lesson 1 – Animals without a Backbone
What are some invertebrates?

12. Lesson 1 – Animals without a Backbone
1. Sponges
-They do not have symmetry
-They live underwater.

13. Lesson 1 – Animals without a Backbone
1. Sponges

14. Lesson 1 – Animals without a Backbone
2. Cnidarians
-Jellyfish and Corals
-Use stinging cells to stun prey.

15. Lesson 1 – Animals without a Backbone
2. Cnidarians

16. Lesson 1 – Animals without a Backbone
3. Mollusks
-Snails and Slugs are the only ones to live on land.
-Clams, oysters, squid, and octopi are examples.

17. Lesson 1 – Animals without a Backbone
3. Mollusks

18. Lesson 1 – Animals without a Backbone
4. Echinoderms
-Sea Urchins
-Have an endoskeleton

19. Lesson 1 – Animals without a Backbone
4. Echinoderms

20. Lesson 1 – Animals without a Backbone
5. Arthropods
-This is the largest invertebrate group.
-Crabs, shrimps, insects, and spiders are some examples.

21. Lesson 1 – Animals without a Backbone
5. Arthropods

22. Lesson 1 – Animals without a Backbone
6. Flatworms
-They have flat bodies
-They are the simplest worms.
-Some live inside of other animals.

23. Lesson 1 – Animals without a Backbone
6. Flatworms

24. Lesson 1 – Animals without a Backbone
7. Roundworms
-They have thin bodies with pointed ends.
-Most live inside of other animals.

25. Lesson 1 – Animals without a Backbone
7. Roundworms

26. Lesson 1 – Animals without a Backbone
8. Segmented Worms
-Earthworms, sandworms, and leeches are examples.
-Most live on land.

27. Lesson 1 – Animals without a Backbone
8. Segmented Worms