Regenerating nerve cell. Transmission electron micrograph (TEM) of a section through a nerve axon (inside dark ring) regenerating within a Schwann cell. The Schwann cell is within the basement membrane of an old Schwann cell. The Schwann cell's nucleus is at upper center. An axon is a nerve fibre that passes information between nerve cells. The axon is surrounded by a myelin sheath (dark ring), a fatty insulating layer formed by the Schwann cells, which increases the speed at which nerve impulses are carried. Only cells of the peripheral nervous system, and not the central nervous system (CNS), are surrounded by Schwann cells and are able to regenerate after injury. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Gschmeissner, Steve |
Bildgröße: | 4670 px × 3742 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |