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Echinoderms

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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  1. Echinoderms

  2. Basic Features • Spiny skinned animals • Spines project through thin skin • Well developed organ systems • Water pumping system w/ internal canals • Tube feet at ends

  3. Tube Feet

  4. Basic Features • Coelum • Radial symmetry • Larvae = bilateral • Closest vertebrate relative • Development similar to chordates (deuterostomes) • Endoskeleton

  5. Larval Pictures (Bilateral Symmetry)

  6. Closest Relative

  7. Reproduction • Sexual • Most have separate male/female sexes • Gametes released into water • Asexual • Regeneration: regrowing lost body parts

  8. Think about this the next time you swallow ocean water

  9. Nice regeneration story

  10. 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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