invertebrate groups sponges worms

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by leonidas75
Last updated 9 years ago

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invertebrate groups sponges worms

InvertebratesToday: Invertebrate Groups

- They have irregular bodies.- They cannot move. They attach themselves to rocks or the sea floor.- Sponges filter seawater, and retain nutritive substances for food.

- They have long, soft bodies.- Some are aquatic, others are terrestrial.- Many are parasites.

Sponges

- They have jelly-like bodies.-They are marine animals.- Some (coral, sea anemone) attach themselves to rocks. Others (medusas) can move about.

Cnidarians

Worms

- They are symmetrical.- They are marine animals.- They have a skeleton made of hard plates, and often have spines.

- They are covered by a hard exoskeleton.- Some are aquatic. Others are terrestrial.

Echinoderms

- They have a soft body.- Many are covered by one or two shells.

Arthropods

Molluscs


Comments

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