Echinodermata

Animals show following features-

• Body is spiny,  bilaterally symmetrical ,triploblastic,coelomate and "Pentaradiate (five rayed)".
• Digestion system is complete .
• Water vascular system is present and helps in  respiration and transportation in body.
• Tube feet help  in locomotion.
• Excretion takes place through body surface.
• Sexual reproduction is seen.
• Ex- Star-fish ,Sea- Urchin etc.

  

  Star-Fish

  
  

  

  Star-Fish (Anatomy)