Invertebrates 1 copyright cmassengale. Characteristics 2

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  • Invertebrates*copyright cmassengale

    Characteristics*

  • Invertebrate PhylaSpongesCnidariansPlatyhelminthesNematodesMollusksAnnelidsEchinodermsArthropods*

  • Sponges (Porifera)Most primitiveCells relatively independentMostly marineNo Symmetry*

  • CnidariansMostly marineRadial Symmetry

    *

  • CnidariansJellyfishHydraCoral

    *Sea anemonePortuguese Man-O-War

  • PlatyhelminthesFlatwormsBilateral symmetryCephalization

    *

    Planarian freshwater flatworm*

  • NematodesTube-like digestive tractRoundworms!Mouth and anusNo segmentation*

  • MollusksClams, snails, squidsVaried habitatsMarineFreshwaterTerrestrial

    *

  • AnnelidsSegmented wormsCommon earthwormLeech

    *

  • ArthropodsJoint-legged animalsExternal skeletonHuge variation mostly insects*

  • EchinodermsAlways marineStarfishes, sea urchins, sea liliesSpiny skin

    *

  • Brittle Star An Echinoderm*

    *

    ***************