Myelinated nerves. Coloured scanning electron micrograph (SEM) of a freeze-fracture through peripheral nerves to show myelinated nerves. A Schwann cell wraps its cell membrane around the nerve a number of times. In-between each cell membrane layer is a layer of myelin (brown),an electrically insulating fatty layer. A Schwann cell effectively thickens a nerve's membrane and increases the speed at which nerve impulses are relayed. The myelin surrounds the axons (blue). Endoneurial connective tissue (green) envelopes the nerve fibers. Magnification: x1000 when printed at 10 centimetres wide. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4848 px × 3605 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |