echinoderms sea stars, sea urchins, and sea cucumbers belong to phylum echinodermata (“spiny...

Download Echinoderms Sea stars, sea urchins, and sea cucumbers belong to phylum Echinodermata (“spiny skin”, “hedgehog skin”) Exclusively marine Adult echinoderms

Post on 21-Dec-2015

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  • Slide 1
  • Echinoderms Sea stars, sea urchins, and sea cucumbers belong to phylum Echinodermata (spiny skin, hedgehog skin) Exclusively marine Adult echinoderms possess pentamerous symmetry; in which the body is arranged in five parts around a central axis No dorsal, ventral, anterior or posterior end; oral and aboral ends only
  • Slide 2
  • Phylum Echinodermata Echinoderms have an internal skeleton, or endoskeleton covered by a bumpy, sometimes spiny, tissue layer Echinoderms have a network of water-filled canals connected to muscular tube feet, which extend when filled with water The vascular system connects to the outside environment via the madreporite on the aboral surface
  • Slide 3
  • Phylum Echinodermata
  • Slide 4
  • Types of Echinoderms Sea stars can regenerate missing body parts Brittle stars have long, flexible arms; most abundant group of Echinoderms Sea urchins have a round, rigid test
  • Slide 5
  • Sea Urchin (class Echinoidea)
  • Slide 6
  • Types of Echinoderms Sea cucumbers are worm-like; elongated along the oral-aboral axis, as if pulled/stretched from the mouth and anus Crinoids use outstretched, feathery arms to capture food particles from the water; includes feather stars and sea lilies

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