Echinoderms Section Review
What characteristics do
echinoderms have?
• They are invertebrates that have an
internal skeleton and a water vascular
system.
How does an echinoderm use its
tube feet to grip a surface?
• The tube feet are sticky at the ends and
when filled with water, they at as suction
cups.
Why is movement using tube feet
slow?
• Because since the tube feet act as
suctions, the animal must release the
suction each time it moves and put the
suction tube feet down again, then repeat
this same action to get to its destination.
What are the four major groups of
echinoderms?
• Sea stars
• Brittle stars
• Sea urchins
• Sea cucumbers