it helps in:
>movement; to coordinate locomotion, to grip on substrate to withstand pressure, and act as sense organs that response to variation within the environment.
>feeding; it helps trap its prey, and with the help of the cilia it carries food to its mouth.
No, it is an echinoderm.
On the ventral side of an echinoderm (say, a sea star, for example) there are hundreds of tiny feet arranged into rows on each appendage. These are called tube feet. By varying the internal water pressure, the echinoderm can extend and contract its tube feet for locomotion, food collection, and respiration
Brittle star is an echinoderm
sea star
The Sea Star.
Brittle star
Locomotion. In the sea star, water enters the system through a sieve plate. Eventually it is pumped into many tube feet, expanding them. When the foot touches a surface, the center withdraws, producing suction that causes the foot to adhere to the surface. By alternating the expansion and contraction of it's many tube feet, a sea star moves slowly along.
A Brittle star is not a myriapod. A Brittle star is an echinoderm. An example of a myriapod would be a centipede.
Echinoderm. From the phylum echinoderma.
Sea star (starfish), sea cucumber
Star fish is not a fish because it is an ''echinoderm''. It is an ''echinoderm'' because its body is divided into five parts and it has a spiny outer covering. It only is called a star''fish'' because it lives in water.
Echinoderms are a group of marine invertebrate animals .They possess spines on skin , tube feet , and water vascular system . Star fish is well known example .