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Sponges & Cnidarians

Sponges & Cnidarians. Mrs. Brown. Characteristics of Sponges. Body contains pores Pores Little openings Important in functions such as reproduction & obtaining food. Characteristics of Sponges. Lack of symmetry (Asymmetrical) Lack tissues & Organs Filter feeders. Reproduction.

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Sponges & Cnidarians

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  1. Sponges & Cnidarians Mrs. Brown

  2. Characteristics of Sponges • Body contains pores • Pores • Little openings • Important in functions such as reproduction & obtaining food

  3. Characteristics of Sponges • Lack of symmetry (Asymmetrical) • Lack tissues & Organs • Filter feeders

  4. Reproduction • Reproduce both sexually (hermaphorditic) & asexually (fragmentation)

  5. Sponges Aplysilla rosea Marine species

  6. Finger Sponge

  7. Grantia (Marine Sponge)

  8. Spongilla (Freshwater Sponge)

  9. Leucosolenia (Marine Sponge)

  10. Euspongia (Commercial Sponge)

  11. Cnidarians • Soft-bodied • Radially symmetrical • Reproduce both asexually (optimal conditions) Budding • Sexually during harsh conditions

  12. Cnidarians • Have long, wavy tentacles arranged around an opening (mouth) • Carnivores • Use stinging cells (cynidocytes) to capture prey & defend themselves.

  13. Two Body Plans • Polyp • Shaped like a vase & mouth opens at the top • Ex. Hydra

  14. Two Body Plans • Bowl shaped medusa • Mouth opening at the Phyllorhiza punctata

  15. Digestion • Cnidarians • Capture prey by stinging them with poisonous venom that paralyzes prey.

  16. Digestion • They then use tentacles to pull prey into their mouth.

  17. EX. Of Cnidarians • Jellyfishes • Sea anemones • Hydras • Corals

  18. Chrysaora quinquecirrha

  19. Brain Coral, Diploria labyrinthiformis

  20. Coral (Gorgonia)

  21. Polyorchis (Jellyfish)

  22. Gonionemus (Jelly Fish)

  23. Portuguese Man o' War

  24. Obelia (Colonial Hydroid)

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