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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. Basic Features. Spiny skinned animals Spines project through thin skin Well developed organ systems

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

  4. Basic Features • Coelum • Radial symmetry • Larvae = bilateral • Closest relative to vertebrates • Deuterostomes = anus develops first • Protostomes = mouth develops first Echinoderms & Vertebrates

  5. Closest Relative

  6. Reproduction • Sexual • Most have separate male/female sexes • Gametes released into water

  7. Reproduction • Sexual • Most have separate male/female sexes • Gametes released into water Think about this the next time you swallow ocean water.

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

  9. Reproduction • Sexual • Most have separate male/female sexes • Gametes released into water • Asexual • Regeneration: regrow lost body parts Nice regeneration story

  10. Feeding crinoids Feather stars • Some filter feed • Some active predators • Pry open shells using tube feet • Stomach releases enzymes to liquify the prey • Fluid is sucked up

  11. Feeding • Some filter feed • Some active predators • Pry open shells using tube feet • Stomach releases enzymes to liquify the prey • Fluid is sucked up Go to YouTube directly

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