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19 Cards in this Set
- Front
- Back
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What are the 6 classes of Echinoderm? |
- crinoidea (feather) - echinoidea (urchins) - asteroidea (starfish) - ophiuroidea (brittle) - holothuroidea (sea cucumbers) - concentricycloidea (sea daisies) |
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What is the system in echinoderms for movement, respiration, food transportation? |
water vascular system |
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What kind of symmetry do echinoderms have? |
pentaradial |
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What kind of skeleton do they have? |
internal CaCO3 |
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What are the larvae called? |
dipleurula |
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What is the lattice of CaCO3 called? |
stereom |
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What can the CaCO3 skeleton be tipped with? |
poison glands or pedicellariae |
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What is aristotle's lantern? |
5 rayed jaw |
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How does catch connective tissue work? |
nerve impulse, NS cells secrete Ca2+, lock in place |
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How do starfish move? |
tube feet |
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What is above the tube feet? |
ampulla |
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What are tube feet connected to? |
WVS |
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How do crinoids + ophiuroids move? |
muscles in arms |
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How do crinoids + ophiuroids feed? |
tube feet |
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How do starfish feed? |
suckers on tube feet |
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How do sea urchins feed? |
cilia on tube feet |
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What are papullae? |
thin parts of wall for gas exchange |
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What is cephalisation and do echinoderms have it? |
nervous tissue concentrating at one end no |
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What form did echinoderms evolve from? |
triradial |
