Question

What are the thin fibers of the human nervous system called?.

Answer 1

Description of the nervous system
Neurons send signals to other cells through thin fibers called axons, which cause chemicals known as neurotransmitters to be released at junctions called synapses

Answer 2

Axons should be your answer.

Step-by-step explanation:

The individual thin fibers in which neurons send signals to other cells are axons. When individual fibers are bundled together, it is called nerve fiber.