The water vascular system uses cilia and the constantly contracting ampullae to keep things moving. Most oxygen enters the starfish via diffusion into the tube feet (with the water vascular system), or the papulae (small sacs covering the upper body surface).
Also to know is, what is the function of the water vascular system found in starfish?
The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet.
Secondly, do cnidarians have a water vascular system? They move using the a hydraulic system called the water vascular system. Jellyfish, hydra, coral, and sea anemones belong to phylum Cnidaria. Cnidarians have radial symmetry, tentacles, and two layers of tissue surrounding a central “stomach” cavity. They also have one digestive opening and a nerve network.
Herein, how does the starfish feed?
A starfish feeds by first extending its stomach out of its mouth and over the digestible parts of its prey, such as mussels and clams. The prey tissue is partially digested externally before the soup-like “chowder” produced is drawn back into its 10 digestive glands.
How do starfish get their energy?
Sea stars use suction in the tube feet for movement and feeding. When the prey is opened, the sea star pushes its stomach out of its body and into the bivalve, secreting enzymes that digest the prey’s soft body tissues. The liquefied bivalve is then absorbed into the stomach.