The outer layer of the brain is gray matter but the outer layer of the spinal cord is white matter.

Name: The outer layer of the brain is gray matter but the outer layer of the spinal cord is white matter.
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The brain's outer layer, the cerebral cortex, is composed of gray matter, which consists of neuron cell bodies. In contrast, the spinal cord's outer layer is white matter, made up of myelinated axon tracts.

The Outer Layer of the Brain Is Gray Matter but the Outer