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Planaria (Cross-eyed worm)

Planaria (Cross-eyed worm). FLATWORMS (Platyhelminthes). INVERTEBRATES no backbone PROTOSTOMES blastopore becomes MOUTH. ACOELOMATES. RESPIRATORY. Breathe through their skin. GASTROVASCULAR CAVITY (Combination Digestive & circulatory). Digestive cavity with 1 opening.

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Planaria (Cross-eyed worm)

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  1. Planaria(Cross-eyed worm)

  2. FLATWORMS(Platyhelminthes) INVERTEBRATES no backbone PROTOSTOMESblastopore becomes MOUTH

  3. ACOELOMATES

  4. RESPIRATORY Breathe through their skin

  5. GASTROVASCULAR CAVITY(Combination Digestive & circulatory) • Digestive cavity with 1 opening http://www.lima.ohio-state.edu/biology/biodiv/animal/planarlp.jpg

  6. EXCRETORY Water is always entering the bodies of animals that live in freshwater

  7. FLAME CELLS • Collect excess water and nitrogen waste • Excreted through pores in skin Moving cilia looklike little “flames”

  8. NERVOUS 2 CEREBRAL GANGLIA 2 NERVE CORDS

  9. 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

  10. REPRODUCTION SEXUAL- (hermaphrodites but trade with partner) ASEXUAL- can use regeneration to grow a new organism from parts

  11. REGENERATION Ability to regrow lost body parts

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