invertebrates

1. Invertebrates

2. What is an invertebrate?
 Invertebrates don’t have a backbone.
 They are usually smaller than vertebrates.
 All invertebrates are oviparous.
 Most animals on earth are invertebrates.
 Some live on land and others live in the soil.
 Some live in water.
 Some can fly.

3. −
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What do invertebrates eat? Outline
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 Not all invertebrates eat the same edit Master text
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 Some eat onlyoutline text
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 They are herbivores.
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 Some eat only other
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animals. Fourth Outline
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 They are carnivores.
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 Some eat plants and
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animals.
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 They are omnivores. Outline Level

4. Eighth −
Classifying invertebrates Outline
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 It is more difficult to classify invertebrates because
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there are so many groups. styles
 The most important groups are:
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 Molluscs
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 Worms − Fifth Outline − Fifth Outline
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 Jellyfish − Sixth Outline − Sixth Outline
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 Sponges
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5. Molluscs
 Mollusks have athe outline text
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muscular body.
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 Some, like snails, have Level
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shell. Fourth Outline
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Many molluscs live in the
sea. Level
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 Mussels, oysters−and
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octopuses are all molluscs.
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6. Anthropods
 Anthropods are the
biggest group of 
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invertebrates. format
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 Their bodies are divided
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into 3 parts.
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 They have a hard skin
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and joints in their legs. Level
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 Insects (ants and bees) Level
and arachnids (spiders − Seventh
and scorpions) are Outline Level
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anthropods.
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7. Worms
 Worms haveoutline text
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a long,
soft body.
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 Some Third on land
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live Outline Level
and others live Outline
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in
water. Level
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Some worms are
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parasites. TheyOutline
live
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inside another animal
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and feed on Outline Level
them.
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8. Jellyfish
 Jellyfish live in 
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water.
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 They have soft − Third Outline Level
bodies and 
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tentacles. Level
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 Be careful! Their − Sixth Outline
tentacles can Level
sting you! − Seventh
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9. Sponges
 Sponges have soft 
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bodies covered with format
holes. 
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 They live in water. 
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10. Starfish
 Starfish are protected
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by hard outer parts.
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 They−live in Outline Level
Third water.
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They usually have 5
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arms, but some can
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