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First, the features available in the outside axon PNS 1 parcel wrapped to form a myelin sheath (myelin). 2 A cell can only form some internodal segment (between two node of Ranvier call it). 3. Paranodal area: node PNS place of some of Ranvier Schwann cell cytoplasm package with node of Ranvier is not bare. (Compare: CNS is bare.) 4. Schwann cell exists out there external lamina. (Muscle cells, too.) Myelin by Schwann cell <peripheral nerve> cladding layers to form cell membranes, a Schwann cell myelin covering only a small portion of the manufacture of a neuron axons. This way nerve cells transmit messages delivered by leaps and bounds, oep the speed 5. Unmyelinated nerve fiber: a large axon is wrapped in Schwann cell cytoplasm oep of simple living. Source: The picture shows the formation of myelin on answers . After the formation of Schwann cell nuclei will be squeezed oep to the outside becomes flat. Mesaxon (axonal peripheral membrane) watched inside and outside, inner near axon; outer close to the film. been squeezed to the outside of the cytoplasmic said outer collar; remnants of the cytoplasm of inner collar. Source: nvo 2. Finishing: Axon containing Schwann cell cytoplasm outside the site: A. Inner collar B. Outer collar C. Paranodal area D. Schimidt-Lantermann cleft 3. myelin was in power under the map, you can see are: A. Major dense line (dark): two inner leaflets B. Intraperiod line (light gray): two outer leaflets 4.Unmyelinated nerve fiber, Schwann cells can see a package with many of the axon (10 ~ 15 个 axon ). But few layers oep coated, thin, signaling slower Source: U.S. National Institutes of Health (NIH) See also: helper cells (supporting cells) two, comparing the PNS and CNS Myelin Sheath
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