Echinoderms
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Echinoderms. Basic Features. Spiny skinned animals Spines project through thin skin Well developed organ systems Water pumping system w/ internal canals Tube feet at ends. Tube Feet. Basic Features. Coelum Radial symmetry Larvae = bilateral Closest vertebrate relative

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Echinoderms

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Echinoderms

Echinoderms


Basic features

Basic Features

  • Spiny skinned animals

    • Spines project through thin skin

  • Well developed organ systems

  • Water pumping system w/ internal canals

    • Tube feet at ends


Tube feet

Tube Feet


Basic features1

Basic Features

  • Coelum

  • Radial symmetry

    • Larvae = bilateral

  • Closest vertebrate relative

    • Development similar to chordates (deuterostomes)

    • Endoskeleton


Larval pictures bilateral symmetry

Larval Pictures (Bilateral Symmetry)


Closest relative

Closest Relative


Reproduction

Reproduction

  • Sexual

    • Most have separate male/female sexes

    • Gametes released into water

  • Asexual

    • Regeneration: regrowing lost body parts


Think about this the next time you swallow ocean water

Think about this the next time you swallow ocean water


Nice regeneration story

Nice regeneration story


Feeding

Feeding

  • Some filter feed

  • Some active predators

    • Pry open shells using tube feet

    • Stomach releases enzymes to liquify the prey

    • Fluid is sucked up


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