click below
click below
Normal Size Small Size show me how
Caroline Harper
Blume Ch.13.4 Echinoderms
Question | Answer |
---|---|
What do echinoderms have that is hard and covered by a bumpy or spiny epidermis? | Endoskeleton |
What kind of symmetry do they have? | Radial |
What do they have around the mouth? | nerve ring |
What is the system that is a network of water-filled canals connected to thousands of tubed feet? | Water Vascular System |
What does the system allow them to do? | Move, exchange carbon dioxide and oxygen, capture food, and remove wastes |
About how many specie exist of the echinoderms? | 6,000 |
They can ______ a lost arm. | Regenerate |
What allow predators to break off an arm, while the brittle star escapes; they quickly regenerate the lost parts? | Sea Stars |
What are disk- or globe-shaped animals covered with spines? | Sea Urchines and Sand Dollars |
What are soft-bodied with a leathery covering? | Sea Cucumbers |
What do echinoderms help do to materials? | recycle |
They date back to how many million years? | 400 |