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11 Cards in this Set
- Front
- Back
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echinoderm |
spiny skinned marine animals that have a water vascular system |
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echinoderm characteristics |
invertebrate live in ocean radial symmetry internal skeleton made of hard plates with protruding spines get oxygen from gills in skin or have tube feet have water vascular system, nervous system, one way digestive system |
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echinoderm examples |
sea star, sea cucumber, sea urchin, sand dollar |
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echinoderm life cycle |
free swimming larva with bilateral symmetry grows to adult echinoderms |
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echinoderm reproduction |
sexually with separate sexes asexual by fission (must have central disk) |
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regeneration |
grow lost body part sea star (re-grows arms) sea cucumber (re-grows stomach) |
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sand dollar |
disk shaped, spiny skinned 5 part radial symmetry live on bottom of sea move by coordinating short spines that cover them to march across sand can burrow in sand when alarmed by predators |
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sea cucumber |
cylinder shaped 5 double rows of tube feet with suction cups tube feet used to crawl or anchor to a rock |
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sea star |
spiny skinned bottom dwelling radial symmetry move slowly along bottom using 100s of tube feet |
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sea urchin |
spiny globular animal lives on ocean floor long spines that extend from body move with spines and tube feet |
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water vascular system |
fluid filled tubes that extend out from the center of the echinoderms body ends in small structures called tube feet works by filling the tubes with water then the system squeezes forcing water into the tube feet muscles attached to each of the tube feet can close the tube off creating suction |
