Answer:
A neuron has three fundamental parts: the dendrites, the cell body, and the axons. A few neurons have a greasy layer covering called The myelin sheath around their axons. This layer isn't constant, and the holes are called hubs of Ranvier . The activity potential bounces through these holes to accelerate the transmission.
Schwann cells are an assortment of glial cells that basically give myelin seclusion from the axons of the vertebrate fringe sensory system. It exists just at the fringe sensory system, while oligodendrocytes assume this job in the focal apprehensive system, they establish the myelin sheath around a solitary axon
The hole between two Schwann cells (the zone not secured by the myelin sheath) is called Ranvier's Nodes. These hubs are imperative particle trade locales between the axon and extracellular liquids (found specifically in the substantial sensory system).
This course of action permits saltatory conduction of the rapid activity potential (PA "bounces" over myelin which gives a speed some of the time more prominent than one hundred meters for every second), just as vitality reserve funds.