Assertion: ganglion's neuron | /r/HasProperty | unique
Facets:
value: in simpler nervous systems
type: OTHER
Source sentences:
text: In vertebrate nervous systems very few neurons are "identified" in this sense—in humans, there are believed to be none—but in simpler nervous systems, some or all neurons may be thus unique.
text: Researchers believe humans have none—but in simpler nervous systems, some or all neurons may be thus unique.