 
 <translate> The relevant information is: Each myelin sheath is formed by the concentric wrapping of an oligodendrocyte or Schwann cell process around the axon.
So, the final answer is the concentric wrapping of an oligodendrocyte or Schwann cell process around the axon. <hau> Bayanin da ya dace shine: Kowane myelin sheath an kafa shi ta hanyar haɗuwa da oligodendrocyte ko tsarin kwayar Schwann a kusa da axon. Don haka, amsar karshe ita ce kewayewar oligodendrocyte ko tsarin kwayar Schwann a kusa da axon. 