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Domain Eukarya Kingdom Animal

Domain Eukarya Kingdom Animal

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Domain Eukarya Kingdom Animal

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  1. Domain EukaryaKingdom Animal

  2. Phylum Platyhelminthes

  3. Phylum Platyhelminthes • the “flatworms” • parasitic and free living • have organ systems • bilateral symmetry • are cephalized

  4. Acoelomates(A-see-low-mate) • Have a digestive cavity but, • No coelom (fluid filled body cavity lined with tissue derived from mesoderm) • Velvet worm

  5. Planaria • Free living • Carnivores or scavengers

  6. Planarian digestive system intestine pharynx Mouth- pharynx extends from mouth One opening- food in and out Extracellular digestion (cavity)

  7. Excretory System May have flame cells Help to excrete excess water and wastes through a tube system leading to a pore in the skin Marine – Chinese flatworm

  8. Nervous System • Ganglion: • For response • Group of nerve cells • Not a brain Marine – Polyclad flatworm Marine – African flatworm

  9. Reproduction • Hermaphrodites • (monoecious) • or • Fission • (break into pieces • And regenerate) Marine – Polyclad flatworm Marine – African flatworm

  10. Parasitic flukes • Parasite (worm) • Host (what it lives on or in)

  11. FLUKE ( monoecious = hermaphroditic ) sucker

  12. Schistosomiasis- a parasitic disease a) caused by the Schistosoma worm) b) attachs to intestinal and bladder walls flukes c) infecting millions of people worldwide d) causes anemia and blood loss

  13. Schistosomes

  14. Intestinal Schistosomiasis 16 yr. Old boy Abdomen accumulates fluid- a body immune response to eggs embedded in tissues

  15. Parasitic tapeworms

  16. Tapeworm showing proglottids Mature proglottids- break off, release fertilized eggs which come out in feces

  17. Tapeworm head light microscope hooks suckers Immature proglottids)

  18. Tapeworm SEM image

  19. Flea - Dog/Cat Tapeworm Life Cycle

  20. Dog eats infected flea Worm grows in dog Flea larva eats tapeworm eggs. Tapeworm larvae develop inside flea Proglottids with eggs leave in wastes

  21. proglottids in dog's fur