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1
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a structure that extends from an arthropod's body
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2
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also called collar cells; lines the internal cavity of the sponge
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3
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the largest flatworm class
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5
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the class where the most primitive hydrozoa are located
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6
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larvae of hydrozoans
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8
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heavy fold of tissue that forms the outer layer of the body
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9
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another form of a jellyfish;tubelike, attaches itself to rocks or something of the sort
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10
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the simplest of all animals
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11
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a tongue- like organ located in the mouth of mollusks
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12
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primitive brain
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15
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a large group of soft-bodied polyps found in coastal areas all over the world: highly muscular and quite complex
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16
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term used to describe the attachment of sponges to other objects
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20
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a protective capsule
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23
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small barbed harpoon within the cnidocyte
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24
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produces a sticky substance which aids in the attachment to objects
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26
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tiny tubular structure that pulls fluid from the coelom
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28
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largest class of cnidarians
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29
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the shedding, discarding of an exoskeleton periodically
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32
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stinging cells located on the tentacles
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33
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water exits these larger pores
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34
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tiny needle made of silica or calcium carbinate
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