Echinoderms. Spiny skin Spiny skin Radial symmetry Radial symmetry Water vascular system Water vascular system.

Download Echinoderms. Spiny skin Spiny skin Radial symmetry Radial symmetry Water vascular system Water vascular system.

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  • Echinoderms

  • Spiny skinRadial symmetryWater vascular system

  • Water IS their blood!Water vascular system- respiration, circulation, movement.Madreporite- connects the ring canal to the outside.

  • ReproductionSexualNo visible difference between M and F!AsexualMany (NOT ALL) species can regenerate missing body parts Tear 1 sea star in half and with some luck both parts of the animal can regenerate the missing pieces.

  • Tube feet- movement, feeding, excretion.Feeding- sea stars push out stomach and enzymes break down the animal.Think milkshakeExcretion- cellular through tube feet(ammonia), solid through anus.

  • Groups of Echinoderms

  • Sea Urchins and Sand DollarsLarge solid platesMost eat algae

  • Brittle StarsFound on coral reefsCan shed an arm to escapeFilter feeders

  • Sea Cucumbers Moving picklesDetritus feeders

  • Sea cucumber

  • Sea StarsMost are carnivoresEat bivalvesCan repair themselves

  • Tube feet in living sea starsea star hunting scallops and clams

  • Sea Lilies and Feather StarsFilter feedersLive in the tropics

  • Feather Star

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