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22 Cards in this Set
- Front
- Back
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Skeleton |
Endoskeleton of calcareous ossicles |
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Exhinodermata derived from |
'Spiny bodied' |
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Habitat |
All Marine |
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Level of organisation |
Organ system |
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Symmetry |
Radial |
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Larvae symmetry |
Bilateral |
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Germ layers |
Triploblastic |
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Coelom |
Coelomate |
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Digestive system |
Complete |
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Digestive system consists |
Mouth on lower (ventral) side and anus on dorsal(upper) side |
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Most distinctive feature |
Water vascular system |
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Water vascular system helps is |
Locomotion capture of food Respiration |
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Excretory system |
Absent |
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Sex separation |
Dioecious |
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Reproduction |
Sexual |
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Development |
Indirect with free swimming larva |
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Examples |
Star fish Sea urchin Sea lily Sea cucumber Brittle star |
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Star fish |
Asterias |
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Sea urchin |
Echinus |
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Sea lily |
Antedon |
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Sea cucumber |
Cucumaria |
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Brittle star |
Ophiura |
