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Published byKerrie Reed Modified over 9 years ago
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Planaria (Cross-eyed worm)
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FLATWORMS (Platyhelminthes) INVERTEBRATES no backbone PROTOSTOMES blastopore becomes MOUTH
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ACOELOMATES
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RESPIRATORY Breathe through their skin
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GASTROVASCULAR CAVITY (Combination Digestive & circulatory) Digestive cavity with 1 opening http://www.lima.ohio-state.edu/biology/biodiv/animal/planarlp.jpg
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EXCRETORY Water is always entering the bodies of animals that live in freshwater
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FLAME CELLS Collect excess water and nitrogen waste Excreted through pores in skin Moving cilia look like little “flames ”
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NERVOUS 2 CEREBRAL GANGLIA 2 NERVE CORDS
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NERVOUS Eyespots: can sense light and dark Simple Learning: Normally moves AWAY from light Can be trained to stay in light Can also sense touch, water currents, & chemicals in water
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REPRODUCTION SEXUAL- (hermaphrodites but trade with partner) ASEXUAL- can use regeneration to grow a new organism from parts
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REGENERATION Ability to regrow lost body parts
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