Assertion: echinoderm's system | /r/MadeOf | modified nerve net
Facets:
Source sentences:
text: Echinoderms have a simple radial nervous system that consists of a modified nerve net consisting of interconnecting neurons with no central brain, although some do possess ganglia.
text: They have a simple radial nervous system that consists of a modified nerve net.
text: They have a simple radial nervous system that consists of a modified nerve net.
text: They have a simple radial nervous system that consists of a modified nerve net.
text: They have a simple radial nervous system that consists of a modified nerve net (interconnected neurons with no central organs); nerve rings with radiating nerves around the mouth extending into each arm; the branches of these nerves coordinate the movements of the animal.