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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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Presentation Transcript
characteristics of sponges
Characteristics of Sponges
  • Body contains pores
    • Pores
      • Little openings
      • Important in functions such as reproduction & obtaining food
characteristics of sponges1
Characteristics of Sponges
  • Lack of symmetry (Asymmetrical)
  • Lack tissues & Organs
  • Filter feeders
reproduction
Reproduction
  • Reproduce both sexually (hermaphorditic) & asexually (fragmentation)
sponges
Sponges

Aplysilla rosea

Marine species

cnidarians
Cnidarians
  • Soft-bodied
  • Radially symmetrical
  • Reproduce both asexually (optimal conditions) Budding
  • Sexually during harsh conditions
cnidarians1
Cnidarians
  • Have long, wavy tentacles arranged around an opening (mouth)
  • Carnivores
    • Use stinging cells (cynidocytes) to capture prey & defend themselves.
two body plans
Two Body Plans
  • Polyp
    • Shaped like a vase & mouth opens at the top
    • Ex. Hydra
two body plans1
Two Body Plans
  • Bowl shaped medusa
    • Mouth opening at the

Phyllorhiza punctata

digestion
Digestion
  • Cnidarians
    • Capture prey by stinging them with poisonous venom that paralyzes prey.
digestion1
Digestion
  • They then use tentacles to pull prey into their mouth.
ex of cnidarians
EX. Of Cnidarians
  • Jellyfishes
  • Sea anemones
  • Hydras
  • Corals