Assertion: echinoderm | /r/HasAspect | simple radial nervous system
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.