INVERTEBRATE ANIMALS

​Remember:

Invertebrate animals don't have a backbone.

​

INVERTEBRATE

ANIMALS

Cnidarians live in the sea.

They have a soft, jelly-like body with one opening.

This opening is surrounded by venomous tentacles.

Jellyfish and sea anemones are cnidarians.

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​CNIDARIANS

Multiple Choice

Jellyfish are....

• CNIDARIANS

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

Multiple Choice

Anemones are....

• CNIDARIANS

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

Multiple Choice

Jellyfish have....

• LEGS

• TENTACLES

Sponges live in water.

They are the simplest invertebrates.

They have no muscles, nervous system or circulatory system.

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SPONGES

Multiple Choice

Sponges are....

• CNIDARIANS

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

Echinoderms live at the bottom of the sea.

They are covered by a hard, spiny skin.

Starfish and sea urchins are echinoderms.

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ECHINODERMS

Multiple Choice

Starfish are....

• CNIDARIANS

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

Multiple Choice

Sea urchins are....

• CNIDARIANS

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

Annelids have a long, soft body with moist skin.

Many annelids are parasites and live inside the bodies of other animals.

Most annelids live in water, but they can also live on land.

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ANNELIDS

Multiple Choice

Worms are....

• CNIDARIANS

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

Multiple Choice

Worms generally have....

• HEAD, THORAX AND ABDOMEN

• A SEGMENTED BODY

• CEPHALOTHORAX AND ABDOMEN

Multiple Choice

Worms have .......... skin.

• MOIST

• DRY

They have soft bodies and most of them have shell.

There are three subgroups:

• Gastropods

• Bivalves

• Cephalopods

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MOLLUSCS

Multiple Choice

Snails are also called gastropods, so they are....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

Multiple Choice

Squids are also called cephalopods, so they are....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

Multiple Choice

Mussels are also called bivalves, so they are....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

All arthropods have an external skeleton called an exoskeleton.

There are four types of arthropods:

• Crustaceans

• Myriapods

• Arachnids

• Insects

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ARTHROPODS

Multiple Choice

Butterflies are ....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

Multiple Choice

Butterflies are ....

• CRUSTACEANS

• MYRIAPODS

• ARACHNIDS

• INSECTS

Multiple Choice

Shrimps are ....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

Multiple Choice

Shrimps are ....

• CRUSTACEANS

• MYRIAPODS

• ARACHNIDS

• INSECTS

Multiple Choice

Spiders are ....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

Multiple Choice

Spiders are ....

• CRUSTACEANS

• MYRIAPODS

• ARACHNIDS

• INSECTS

Multiple Choice

Millipedes are ....

• SPONGES

• ECHINODERMS

• ANNELIDS

• MOLLUSCS

• ARTHROPODS

Multiple Choice

Millipedes are ....

• CRUSTACEANS

• MYRIAPODS

• ARACHNIDS

• INSECTS

Multiple Choice

One of these groups of animals IS NOT an arthropod.

• Myriapods

• Gastropod

• Crustaceans

• Arachnids

• Insects

Multiple Choice

If an arthropod has 3 pairs of legs, this animal is a .......

• MYRIAPOD

• CRUSTACEAN

• ARACHNID

• INSECT

Multiple Choice

If an arthropod has 4 pairs of legs, this animal is a .......

• MYRIAPOD

• CRUSTACEAN

• ARACHNID

• INSECT

Multiple Choice

If an arthropod has 5 pairs of legs, this animal is a .......

• MYRIAPOD

• CRUSTACEAN

• ARACHNID

• INSECT

Multiple Choice

If an arthropod has more than 5 pairs of legs, this animal is a .......

• MYRIAPOD

• CRUSTACEAN

• ARACHNID

• INSECT

Multiple Choice

If an arthropod has a segmented body, this animal is a .......

• MYRIAPOD

• CRUSTACEAN

• ARACHNID

• INSECT

Multiple Choice

If an arthropod has a head, a thorax and an abodomen, this animal is a .......

• MYRIAPOD

• CRUSTACEAN

• ARACHNID

• INSECT