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Likewise, people ask, do echinoderms have nervous system?

Members of this invertebrate marine phylum include starfish, sea urchins and sand dollars. Though they lack brains, echinoderms do have a nervous system and sensory organs.

Beside above, what type of nervous system does a starfish have? The nervous system of the starfish is very simple there is no brain and there are not even any ganglia to coordinate movement. The nervous system is characterized by a nerve ring that surrounds the mouth. A radial nerve branches off of the nerve ring and extends to each arm.

Secondly, do sea cucumbers have a central nervous system?

Sea cucumbers have five rows of paired tentacles on the surface of the body. Sea cucumbers do not have brain. Their nervous system consists of a ring and several nerves.

How do echinoderms sense their environment?

Echinoderms do not have brains, they have nerves running from the mouth into each arm or along the body. They have tiny eyespots at the end of each arm which only detect light or dark. Some of their tube feet, are also sensitive to chemicals and this allows them to find the source of smells, such as food.