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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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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 • Reproduce both sexually (hermaphorditic) & asexually (fragmentation)
Sponges Aplysilla rosea Marine species
Cnidarians • Soft-bodied • Radially symmetrical • Reproduce both asexually (optimal conditions) Budding • Sexually during harsh conditions
Cnidarians • Have long, wavy tentacles arranged around an opening (mouth) • Carnivores • Use stinging cells (cynidocytes) to capture prey & defend themselves.
Two Body Plans • Polyp • Shaped like a vase & mouth opens at the top • Ex. Hydra
Two Body Plans • Bowl shaped medusa • Mouth opening at the Phyllorhiza punctata
Digestion • Cnidarians • Capture prey by stinging them with poisonous venom that paralyzes prey.
Digestion • They then use tentacles to pull prey into their mouth.
EX. Of Cnidarians • Jellyfishes • Sea anemones • Hydras • Corals