Axon [axon – LNH (The Leningrad histologic nomenclature); Greek axon – an axis; synonyms: an osevotsilindrichesky shoot, the axial cylinder, a neurite] – a shoot of neuron which carries out nervous impulses to effectors or other neurons.

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The weight of a human brain makes about 2% of all body weight, however it consumes about 20% of the oxygen coming to blood. This fact does a human brain extremely susceptible to the damages caused by shortage of oxygen.