Echinoderms

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Echinoderms

• Kingdom Animalia
• Phylum Echindermata

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Characteristics

• Spiny skin
• Internal skeleton
• Water vascular system
• Carries out essential body functions
• Respiration
• Circulation
• Movement
• Tube feet suction-cuplike structures
• Most adults have 5-part radial symmetry
• Includes sea urchins, sand dollars, brittle
  stars, sea cucumbers, sea stars, sea lilies, and
  feather stars