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Echinoderms

Echinoderms are unique marine animals known for their spiny skin and well-developed organ systems. With a body structure featuring radial symmetry and tube feet, they have specialized water pumping systems and can regenerate lost body parts. Reproduction is primarily sexual, with separate male and female gametes released into the water, but they can also reproduce asexually through regeneration. Their feeding strategies range from filter feeding to active predation, showcasing their adaptability in various marine environments.

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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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