Assertion: gray matter's axon | /r/HasProperty | protected by a myelin sheath
Facets:
Source sentences:
text: The axons that carry nerve impulses are protected by a myelin sheath.
text: Axons are protected by the myelin sheath, which provides insulation from the electrical processes, allowing them to perform nerve signals more quickly.
text: The axons that carry nerve impulses are protected by a myelin sheath.