Phylum Echinodermata
Characteristics
- the first deuterostomes!!!
- marine animas
- calcium endoskeleton (semi-flexible)
- pentaradial (5-way) symetry
- have regeneration abilities*
- have a closed Water Vascular System (WVS) **
** water goes in the madroporite through the stone canal to the ring canal where the water goes five ways to the five radial canals, the water flows down the radial canal to the ampula where it is used for suction with the tube feet.