Schwann cells make the myelin sheath that encloses some axons
Because it contains a lot of axons with their fatty myelin sheaths. The fat is white.
Myelination is that process.
axons
On the outer parts
Cause leg pain and weakness
Spinal nerves are said to be mixes because their posterior roots contain sensory axons and their anterior roots contain motor axons.
the what? root of a spinal nerve consists of motor neuron axons
Schwann cells and oligodendrocytes
myelinated axons
unmyelinated axons.
No, they form myelin sheaths on axons in the CNS while schwann cells form myelin sheaths in the PNS. Hope this answers your question.
Oligodendrocyte; processes of the oligodendrocytes form the myelin sheaths around the CNS nerve fibers