Marine worms

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Marine worms

  1. 1. Marine Worms
  2. 2. Types of Marine WormsPhylum Platyhelminthes – the flatwormsPhylum Nemertea – the ribbonwormsPhylum Nematoda – the roundwormsPhylum Chaetagnatha – the arrow wormsPhylum Pogonophora – the deep sea tubewormsPhylum Annelida – the segmented worms
  3. 3. Phylum Nemertea – the ribbonworms
  4. 4. Phylum Nematoda – the roundworms
  5. 5. Phylum Chaetagnatha – the arrow worms
  6. 6. Phylum Pogonophora – the deep sea tubeworms
  7. 7. Phylum Platyhelminthes – the flatworms-Ex:Tapeworms, Planaria, Parasitic Fluke-Some parasites, some free-living scavengers orpredators-Some cause “Swimmers’Itch”
  8. 8. Phylum Platyhelminthes cont.• Flattened• No segments• Bilateral symmetry• Sexual & asexual reproduction
  9. 9. Phylum Platyhelminthes cont. • Mouth/Anus in same spot • Simplest animal to have a CNS • Light sensitive eyespots • 3 cell layers
  10. 10. Phylum Annelida – the segmented worms • Ex: earthworms, leeches, pol ychaetes (bristle worms) • Bodies divided into ring- like sections • More advanced of the worms • Bilaterally symmetrical
  11. 11. Phylum Annelida cont.• Coelom – fluid filled body space• Between digestive tube and body wall – helps animal move, acts like a skeleton
  12. 12. Phylum Annelida cont.• Other advances include: – Body systems (not present in more primitive worms), i.e. digestive, nervous, circulatory (with blood, hemoglobin)
  13. 13. Phylum Annelida cont.Annelida Lifestyles: -burrow -build tubes -sessile -swimming
  14. 14. Phylum Annelida cont.Annelida Feeding Strategies: -Parasitic -Suspension feeding -Deposit feeding -Predators
  15. 15. My personal favorite Annelida - Nerius

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