IMG_0125.jpeg

The image shows two diagrams illustrating the myelination of nerve fibers. **Diagram (a): Myelination by Neurolemmocytes (PNS)** * **Neuron cell body:** A large, central structure of the neuron. * **Neurofibril node:** Gaps in the myelin sheath along the axon. * **Axons:** The long, slende...

The image shows two diagrams illustrating the myelination of nerve fibers. **Diagram (a): Myelination by Neurolemmocytes (PNS)** * **Neuron cell body:** A large, central structure of the neuron. * **Neurofibril node:** Gaps in the myelin sheath along the axon. * **Axons:** The long, slender projections of the neuron that transmit electrical signals. * **Neurolemmocytes:** Cells that wrap around the axon forming the myelin sheath. * **Neurilemma:** The outermost layer of the myelin sheath. * **Myelin sheath:** A fatty insulating layer around the axon that facilitates rapid signal transmission. **Diagram (b): Myelination by Oligodendrocytes (CNS)** * **Oligodendrocytes:** Cells that create the myelin sheath in the central nervous system (CNS). * **Axons:** The nerve fibers that transmit signals in the CNS. * **Neurofibril node:** Gaps in the myelin sheath along the axon. * **Myelin sheath:** A fatty insulating layer aiding rapid signal conduction. The diagrams illustrate how different types of glial cells (neurolemmocytes and oligodendrocytes) create the myelin sheath around nerve fibers, which increases the speed of nerve impulses in the peripheral nervous system (PNS) and central nervous system (CNS), respectively.