White matter areas of the nervous system mostly contain:

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White matter areas of the nervous system consist mostly of myelinated axons, which are responsible for transmitting signals between neurons and different areas of the brain and spinal cord. Neuron cell bodies are located in the gray matter areas, while cerebrospinal fluid is found in the ventricles of the brain and the central canal of the spinal cord. Ganglia are clusters of neuron cell bodies located outside of the brain and spinal cord.

White Matter Areas of the Nervous System Mostly Contain