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Neurons have three main parts: 1  Cell body or Soma: it is the main part of the cell, the one that makes all metabolism and functions. It is very similar to other body cells, except for the difference that neurons do not replicate.  Axon: it is the longest and most important part of the neuron, it transmit the impulse.
Vitamin B12, or cobalamin, is an essential vitamin for the proper functioning and development of the brain and the nerve cells. It plays an important role in the maintenance of the sheaths that cover and protect the nerves of the central and the peripheral nervous system, ensuring proper and faster nerve-impulse transmission.