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Marine worms
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- 2. Types of MarineWorms Phylum Platyhelminthes – the flatworms Phylum Nemertea – the ribbonworms Phylum Nematoda – the roundworms Phylum Chaetagnatha – the arrow worms Phylum Pogonophora – the deep sea tubeworms Phylum Annelida – the segmented worms
- 3. Phylum Nemertea –the ribbonworms
- 4. Phylum Nematoda –the roundworms
- 5. Phylum Chaetagnatha –the arrow worms
- 6. Phylum Pogonophora –the deep sea tubeworms
- 7. Phylum Platyhelminthes –the flatworms -Ex: Tapeworms, Planaria, Parasit ic Fluke -Some parasites, some free- living scavengers or predators -Some cause “Swimmers’ Itch”
- 8. Phylum Platyhelminthes cont. • Flattened • No segments • Bilateral symmetry • Sexual & asexual reproduction
- 9. Phylum Platyhelminthes cont. • Mouth/Anus in same spot • Simplest animal to have a CNS • Light sensitive eyespots • 3 cell layers
- 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. Phylum Annelida cont. •Coelom – fluid filled body space • Between digestive tube and body wall – helps animal move, acts like a skeleton
- 12. Phylum Annelida cont. •Other advances include: – Body systems (not present in more primitive worms), i.e. digestive, nervous, circulatory (with blood, hemoglobin)
- 13. Phylum Annelida cont. AnnelidaLifestyles: -burrow -build tubes -sessile -swimming
- 14. Phylum Annelida cont. AnnelidaFeeding Strategies: -Parasitic -Suspension feeding -Deposit feeding -Predators
- 15. My personal favoriteAnnelida - Nerius