nerve net
Noun
Meaning
nerve net (plural nerve nets)
(biology) Simplistic and uncentralized nervous system of cnidarians.
Examples
Cnidarians' activities are coordinated by a decentralized nerve net and simple receptors.
In most jellyfish the nerve net is spread more or less evenly across the body; in comb jellies it is concentrated near the mouth.
Hydra generally react in the same way regardless of the direction of the stimulus, and this may be due to the simplicity of the nerve net.