Echinoderms Worksheet

These tubular stands have suction cups on one end and help echinoderms move and hold onto surfaces.
Means spiny skin. All these creaatures have tube feet, no brains and no eyes.
The system of canals in sea stars that transports oxygen, food and other things.
These creaatures can be found all over th ocean. They typically have five arms radiating from a central disk.
The ability to regrow a body part. Sea Stars are able to do this amazingly well.
These echinoderms can be mistaken as plants. Commonly called sea lilies or feather stars.
The name for a feather star's arms.
The feelers atttached to bottom of a crinoid. They cling to corals and sponges.
An small animal that looks like a pincushion. They have no arms, but are covered in spines.
These are the "shells" left when a sea urchin dies taht wash up on the shore. They are not really shells.
What scientist call the special arrangement of the sea urchins's five teeth.
These unique sausage-shaped echinoderms "spill their guts" when they are scared as a defense.
These compose the star pattern on the bottom of sand dollars. Cilia move food down these grooves to the mouth.