Valvatida Cardiovascular System:
The Valvatida are an order of sea star that are part of the Echinodermata phylum. They contain about 700 species and they live in the ocean. Like the sea urchins the Valvatida don't have a cardiovascular and they have a water vascular system that has the same concept as the urchins system. The system helps the valvatida move and to consume food. |