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Halle Hudson
Blume Ch 13.4 Echinoderms
| Question | Answer |
|---|---|
| what do Echinoderms feed on | plants and animals |
| what is a water-vascular system | a network of water-filled canals |
| what are tube feet | hollow thin tubes |
| what animals are in the Echinoderms group | bristle stars, sea stars, sand dollars, sea urchins, sea cucumbers |
| how do sea stars reproduce | sexually |
| how do the bristlie stars' have an advantage to predators | when the predator is trying to bite of one arm it can swim away because its arms are fragile and break of easily |
| what does Echinoderms mean | spiny skin |
| what are the bristlie stars' tube feet used for | moving particles of food through their mouth |
| what are sea urchins and sand dollars covered with | spines |
| what shape are the sea urchins and the sand dollars | disk or globe- shaped |
| do sea urchins or sand dollars have a five-pointed pattern on their surface | sand dollars |
| what don't sand dollars and sea urchins have | arms |
| what do the sacs contain on the sea urchin | toxic fluid that is injected into predators |
| how do the spines benefit the sea urchins and the sand dollars | they help them move through the water and help them burrow |
| sea cucumbers have what type of covering | leathery |
| where are the sea cucumbers tentacles located | around their mouths and on rows of their tube feet on their upper and lower surfaces |
| what do sea cucumbers eat | planton!! and detritus |
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