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CFORE44
Blume Ch. 13.4
Question | Answer |
---|---|
What are tube-feet? | Hollow thin walled tubes that end in a suction cup. |
How many species of echinoderms are there? | Approximately 6,000 species |
Name 3 types of echinoderms | Sea stars, sea cucumbers, Sea urchins |
How are echinoderms valuable to the environment? | They recycle and feed on dead materials |
How long do echinoderms date back? | 400 million years |
What does a water vascular system do? | It helps them move, exchange carbon dioxide for oxygen, capture food and release wastes. |
How do brittle stars eat? | their tube feet help move food particles into their mouth. |