Lesson 1 – Animals without a Backbone - PowerPoint Presentation

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Lesson 1 – Animals without a Backbone

Vocabulary words:invertebrate- an animal without a backbone

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Vocabulary words:

sponge- a simple invertebrate that has a hollow body with a single opening and lives in water

Lesson 1 – Animals without a Backbone

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Vocabulary words:

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

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Vocabulary words:

mollusk- an invertebrate that has a soft body and a shellLesson 1 – Animals without a Backbone

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Vocabulary words:

echinoderm- a spiny skinned invertebrateLesson 1 – Animals without a Backbone

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Vocabulary words:

endoskeleton- an internal supporting structureLesson 1 – Animals without a Backbone

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Vocabulary words:

arthropod- an invertebrate with jointed legs, a body that is divided into sections, and an exoskeletonLesson 1 – Animals without a Backbone

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Vocabulary words:

exoskeleton- a hard covering that protects the bodies of some invertebratesLesson 1 – Animals without a Backbone

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How do animals differ?

1. Symmetry- some animals have symmetry while others do not.

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Backbon

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

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What are some invertebrates?

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1. Sponges -They do not have symmetry

-They live underwater.Lesson 1 –

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1. Sponges

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2. Cnidarians -Jellyfish and Corals

-Use stinging cells to stun prey.Lesson 1 –

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2. Cnidarians

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3. Mollusks -Snails and Slugs are the only ones to live on land.

-Clams, oysters, squid, and octopi are examples.Lesson 1 –

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3. Mollusks

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4. Echinoderms -Sea Urchins

-Have an endoskeleton

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4. Echinoderms

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5. Arthropods -This is the largest invertebrate group.

-Crabs, shrimps, insects, and spiders are some examples.Lesson 1 –

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5. Arthropods

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6. Flatworms

-They have flat bodies -They are the simplest worms. -Some live inside of other animals.

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6. Flatworms

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7. Roundworms

-They have thin bodies with pointed ends. -Most live inside of other animals.

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7. Roundworms

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8. Segmented Worms

-Earthworms, sandworms, and leeches are examples. -Most live on land.

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8.

Segmented Worms

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