0
They don't technically have a brain. Echinoderms have a simple radial nervous system with a nerve net, like in jellyfish but different. The nerve net has no central brain, although there may be ganglia present.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agono
---
Well, some do have complex circular ganglia. The cubozoans (box jellies) also have the ability to sense their environment and react to it, and possibly even use their complex eyes to persue prey and avoid obstacles. Whether their nervous system is complex enough to function at the level of a simple mammalian brain is open to debate, but the term, brain, usually connotes a discrete organ rather than a radially symetric nervous system.
On the other hand, the true jellies (scyphozoans), have a very simple circular nerve network lacking complex ganglia. It could hardly be defined as a brain, yet it at least suffices to influence feeding behavior depending on satiation.
Wiki User
∙ 12y agoNo, instead they have a nerve net
Add your answer:
Earn +20 pts
What are the characteristics of cnidarians?
All cnidarians have on their tentacles stinging cells called nematocytes. They have no brains or a central nervous system. Another common feature is that they all can regenerate, letting them produce asexually (without the need for another partner) and to recover from injury.
What are the differences of cnidarians and echinoderms?
CnidarianRadial symmetryNo body cavity other than gastrovascular cavitydiploblastic - 2 primary layers ( endoderm and ectoderm )Unique stinging cellsOne opening to digestive trackHydrostatic skeleton based on gastrovascular cavitymore primativeEchinodermRadial Symmetric adults, Bilateral larvaeDeuterostome developed coelomTriploblastic - 3 primary layers ( endoderm, ectoderm and mesoderm)Unique water vascular systemComplete digestive trackcalcareous endoskeleton, supplemented by water vascular systemMore derived
What are two types of cnidarians that are formed by colonies?
small cnidarians and big cnidarians
Do cnidarians have nerves?
cnidarians have no nervous system
Is a cnidarians invertebrates?
Yes, cnidarians are invertebrates.
What is the family for cnidarians?
The cnidarians are in the Kindom family
Symmetry of cnidarians?
Cnidarians have a radial symmetry.
Are earthworms cnidarians?
Nope - Cnidarians are marine creatures !
What is a Cnidarians such as a box jellyfish?
cnidaria(similar to cnidarians)
How do cnidarians reproduce.?
Cnidarians reproduce asexually and sexually
How protists are helpful amongst cnidarians?
They provide a habitat for Cnidarians
Difference between cnidarians and corals?
There is none. Corals are cnidarians.
