Blume Ch.13.4 Echinoderms
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What do echinoderms have that is hard and covered by a bumpy or spiny epidermis? | Endoskeleton
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| What kind of symmetry do they have? | Radial
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| What do they have around the mouth? | nerve ring
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| What is the system that is a network of water-filled canals connected to thousands of tubed feet? | Water Vascular System
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| What does the system allow them to do? | Move, exchange carbon dioxide and oxygen, capture food, and remove wastes
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| About how many specie exist of the echinoderms? | 6,000
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| They can ______ a lost arm. | Regenerate
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| What allow predators to break off an arm, while the brittle star escapes; they quickly regenerate the lost parts? | Sea Stars
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| What are disk- or globe-shaped animals covered with spines? | Sea Urchines and Sand Dollars
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| What are soft-bodied with a leathery covering? | Sea Cucumbers
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| What do echinoderms help do to materials? | recycle
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| They date back to how many million years? | 400
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