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13 Cards in this Set
- Front
- Back
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choanocyte
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specialized cells that use flagella to move a steady current of water through the sponge
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osculum
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a large hole at the top of the sponge
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spicule
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spike-shaped structure made of chalklike calcium carbonate or glasslike silica
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internal fertilization
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a process in which eggs are fertilized inside the sponge's body
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larva
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an immature stage of an organism that looks different than the adult form
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gemmules
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groups of archaeocytes surrounded by a touch layer of spicules
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invertebrate
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animals with no backbone
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vertebrate
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animals with a backbone
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radial symmetry
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any number of planes can be drawn through
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bilateral symmetry
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only one plane can be drawn through
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benthic
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living on the bottom of the ocean floor
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porifera
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pore bearers
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mesenchyme
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jellylike membrane that archaeocytes move through
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