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Zoology: Cnidarias

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2 body plans of cnidarians

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polyp and medusa

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2 body plans of cnidarians

polyp and medusa

tentacles facing up

tentacles facing down

outermost layer of skin for protection, sensation, and movement

"jelly of the jelly" offers support, structure, and contains fiber for support

2nd inner layer cells release enzymes for digestion in the gastrovascular cavity

gastrovascular cavity

digestive chamber with a single opening

cnidocyte/nemaocyst

"stinging cells" release the venom to immobilize prey and protect itself

"esophagus" or a tube that connects the mouth/anus to the gastrovascular cavity

specialized tentacles that bring prey to the mouth

tentacleslong strands of tissue that contain cnidocytes that can sting and immobilize preygonadsex organsnerve netnerve cells work w/ muscular cells for response to stimuliRhopaliumorgan that collects and responds to stimulieyespot (box jelly)collects light waves, stimuli, or informationhydrostaticSkeleton based on contractile elements acting against water or a fluid filled body cavity

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