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25 Cards in this Set
- Front
- Back
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subkingdom parazoa
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animals set aside
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phylum porifera
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sponges
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Colonial organisms
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how a division of labor
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Archaeocytes
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unspecialized, totipotent
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Amoebocytes
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wandering amoeboid cells
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Choanocytes
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feeding cells (collar cells)
Joint action of choanocyte flagella moves water through the sponge Delivers food, oxygen, gametes Carries off wastes (mostly ammonia) |
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Spicules
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Digest, transport, and store food
Transport sperm to the eggs Secrete spicules (= “skeleton”) |
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Spongin
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protein fibers. type of spicule.
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ostia
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outer pores
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osculum
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where water exits
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spongocoel
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central cavity, where water enters.
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radiata
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radially symmetric animals
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bilateria
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bilaterally symmetric animals
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phylum cnidaria
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hydrozoans, coral, anemones
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gastrovascular cavity (GVC)
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serving for digestion and circulation, as a cavity. cnidarians were the first to develop it.
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mesoglea
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"jelly in the middle" filling for space between ectoderm and endoderm.
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tentacles
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studded with nematocysts, passes prey to mouth
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cnidocytes
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Stinging cells contain coiled nematocysts
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nematocysts
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Long threads with spines or poison barbs to ensnare and stun prey
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dimorphic
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Sessile and motile
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polyp
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sessile stage. buds off.
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medusa
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sexual stage, produce gametes
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planula larva
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Larvae mature into new polyp
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budding
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Asexual reproduction in polyps
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ephyra
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tiny medusae
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