Echinodermata are so named owing to their spiny skin (from the Greek “echinos” meaning “spiny” and “dermos” meaning “skin”), and this phylum is a collection of about 7,000 described living species. Echinodermata are exclusively marine organisms. Sea stars (Figure), sea cucumbers, sea urchins, sand dollars, and brittle stars are all examples of echinoderms. To date, no freshwater or terrestrial echinoderms are known.

Complete the tasks on the list below:

• Go to this page, http://cnx.org/contents/GFy_h8cu@10.53:iMLwkLRX@5/Superphylum-Deuterostomia, and read the about the following Phylum:
• Echinodermata
• The QR codes on the page that link to the following, be sure to take the time to visit each link below, or use the QR codes on the page.
• Echinoderm Animation: Sea Star Body Plan 
• Use the Glossary at the bottom of the page to help with the vocabulary for this week
• Use the Review Questions and Free Response questions to check for understanding

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