| Term | Definition |
|---|
| What kind of symmetry do echinoderms have? | 5- Part radial as adult; bilateral as larvae |
| Where is the anus and mouth located on an echinoderm? | Anus-aboral surface; mouth-oral surface |
| What are the characteristics of a typical echinoderm? | Spiny skin, a water vascular system, most have 5-part radial symmetry, and tube feet |
| Where does water enter? | madreoporite |
| Where does water leave? | Through tube feet |
| Describe the flow of water from the madreporite to the tube feet. | The madreporite connects to a ring canal by the stone canal. From the ring canal, 5 radial canals extend. Then, Lateral canals connect to ampulla, which is connected to the tube feet. |
| What does echinoderm mean in Greek? | "spiny skin" |
| Where is the digestive gland located? | Down the arm, underneath the spink skin, right above the gonads. |
| What does the water vascular system control? | respiration, circulation, excretion, reproduction, and movement |
| Where are they eyespots located? | tip of ray |
| What kind of feeders are brittle stars? | filter feeders and detritivores |
| What type of nitrogenous waste is excreted? | ammonia because it gets diluted in the water |
| Would you expect an echinoderm to have seperate sexes or be a hermaphrodite? | Seperate sexes; except some sea cucumbers are hermaphrodites. |
| What kind of sexual reproduction do echinoderms have? | External fertilization |
| On what side do they travel on? | Oral with tube feet |
| What organisms are in the class holothuroidea? | Sea cucumbers |
| What does the nervous system include? | nerve ring and radial canals through the rays (arms) |
| What does the digestive system include? | Mouth, Cardiac stomach, pyloric stomach, pylorica caecum, intestine, rectal glands, and anus |
| How do echinoderms respire? | Skin gill; tube feet |
| Where do echinoderms live? | salt water (marine) |
| What organisms belong to the class Ophiuroidea? | Brittle Stars and Sand Dollars |
| What class do sea urchins belong to? | Echinoidea |
| What class do sea lilies and feathery stars belong to? | Crinoidea |
| Asteroidea are what animal? | Sea star |
| 5 bony plates fused together: what organism? | Sea urchin |
| What are tube feet used for? | touch, taste, and excretion, part of spine, movement |
| Stays stable with a holdfast: what organism? and class? | Feathery stars; Crinoidea |
| Only considered encinoderm because it has tube feet: what organism? (HINT: looks like pickle) | Sea cucumber (Holothuriodea) |
| skeleton of marine animals | Sand dollar |
| Why are the sand dollars a more convenient observation for reproducion? | Many are found together, which makes reproduces better and easier |
| What kind of feeders are sea urchins? | grazers/herbivores/algae eaters |
| How do sea cucumbers move? | Crawl with tube feet and endoskeleton |
| In the endoskeleton, what are the skeletal plates called? | ossicles |
| What else do echinoderms use for response besides their nervous system? | Ocelli, statocysts, chemosensors |
| How do members of the class Crinoidea move? | They don't because they are sessile |
| What materials ad how do these materials circulate through the echinoderm? | Wastes, food, water, and nutrients circulate through the echinoderm by means of the water vascular system. |
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