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Phylum Porifera

Phylum Porifera. Phylum Porifera. Sponges are the simplest animals Radially symmetrical Acoelomate Body resembles a perforated sac. Has inner cavity called spongocoel Has large opening called osculum Lining body are cells flagellated cells called choanocytes

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Phylum Porifera

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  1. Phylum Porifera

  2. Phylum Porifera • Sponges are the simplest animals • Radially symmetrical • Acoelomate • Body resembles a perforated sac. • Has inner cavity called spongocoel • Has large opening called osculum • Lining body are cells flagellated cells called choanocytes • These cells beat to produce a flow of H20 into the sponge through pores in through the body wall, and out through the osculum. • Body wall is composed of many elements • Mesohyl - gelatenous material • Amoebocytes • Motile cells which perform many functions • Capture, digest and transport food • Create tough structural fibers of the body wall called spicules.

  3. A Typical Sponge

  4. Sponges

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