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How many classes are in the Phylum Echinodermata? What are they?
- 5
- Crinoidea, Ophiuridea, Echinoidea, Holothuroidea, Asteroidea
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Sea Lilies belong to what Class?
Crinoidea
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Brittle Stars belong to what Class?
Ophiuroidea
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Sea Urchins belong to what class?
Echinoidea
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Sand dollars belong to what class?
Echinoidea
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Sea Cucumbers belong to what class?
Holothuroidea
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Sea stars belong to what class?
Asteroidea
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Describe the process that a sea star goes through to eat a clam.
stomach leaves body, it digests the clam outside its body, then retracts its stomach
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what is used to increase surface area and for respiration?
Dermal Branchiae
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where is the eyespot located and what is it's function?
on the tip of the arm, photoreception
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What connects to tube feet?
Radial canal
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What do echinoderms have that aid in movment and sometimes in feeding?
Water-vascular system
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