Biology 28 4 echinoderms

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Biology 28 4 echinoderms

  1. 1. 28-4 Echinoderms<br />
  2. 2. endoskeleton<br />Structural support located inside the body of an animal.<br />
  3. 3. Water Vascular System<br />System of internal tubes in echinoderms that carries out essential functions such as feeding, respiration, circulation, and movement.<br />
  4. 4. Madreporite<br />sievelike structure through which the water vascular system of an echinoderm opens to the outside.<br />
  5. 5. Tube foot<br />Suction-cuplike structure attached to radial canals of echinoderms; used to walk and to open shells<br />
  6. 6. Key Concept<br />Echinoderms are characterized by spiny skin, an internal skeleton, a water vascular system, and suction-cuplike structures called tube feet. Most adult echinoderms exhibit five-part radial symmetry.<br />
  7. 7. Key Concept<br />The water vascular system, which is filled with fluid, carries out many essential body functions in echinoderms, including respiration, circulation, and movement.<br />
  8. 8. Key Concept<br />Classes of echinoderms include sea urchins and san dollars; brittle stars; sea cucumbers; sea stars; sea lilies and feather stars.<br />

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