So this is our cell body, these are the dendrites, and this is our axon. If we take a cross section of this axon, we basically get the following diagram. So, let's suppose we stimulate our axon hillock, as shown, and an action potential is generated at the axon hillock as it begins to move along, eventually it gets to the cell membrane that contains the myelin natived sheath. And so, as soon as it gets to that sheath, no more action potential can actually travel through the cell membrane. Instead, that electric signal will propagate at a much quicker rate through the cytoplasm of the cell. So this is the cytoplasm, this is the outside region, these are the myelinated sheets, and these are the nodes of Ranveer.