单词 | myelin sheath |
释义 | > as lemmasmyelin sheath myelin sheath n. Anatomy the covering of myelin found around the axons of certain nerve fibres, formed in the peripheral nervous system by Schwann cells and in the central nervous system by oligodendrocytes. ΚΠ 1892 Philos. Trans. 1891 (Royal Soc.) B. 182 161 There is no change in the staining of the myeline sheath. 1947 A. D. Imms Outl. Entomol. (ed. 3) ii. 25 Each axon is covered by a nucleated coat or neurilemma: there is no myelin sheath as in vertebrates. 1999 New Scientist 14 Aug. 39/3 The Schwann cells migrated along the existing pathways and into the injury site and formed myelin sheaths. < as lemmas |
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