Myelinated Neuron
The myelin sheath is a fatty, protein-rich insulating layer that wraps around certain neuron axons, speeding up electrical impulse transmission by allowing signals to "jump" between gaps called Nodes of Ranvier (saltatory conduction). Formed by glial cells (Schwann cells in PNS, oligodendrocytes in CNS), this lipid-packed sheath acts like electrical wire insulation, preventing signal loss and enabling rapid, efficient nerve communication.-pkk