| 单词 | cell sheath |
| 释义 | > as lemmascell sheath cell sheath n. Biology an additional external layer occurring around certain types of cell; esp. the myelin sheath of a neuron or a layer of mucilage or glycoprotein surrounding certain prokaryotes. ΚΠ 1863 Philos. Trans. 1862 (Royal Soc.) 152 933 We have seen that the cell-sheath or wall is the product of, and indeed is constituted by, the very surface of the primitive nucleus or cell. 1904 New Phytologist 3 217 Cells about to develop into spores..exhibit two well-marked integuments at an early stage... The outer one (cell-sheath)..takes the form of a hollow, more or less cylindrical sheath, surrounding the inner investment. 1960 Jrnl. Biophysical & Biochem. Cytol. 8 816/2 The cells of blue-green algae have been described as lacking the rigid cell wall that is present in bacteria and as being bounded instead by two layers, the ‘cell sheath’..and the ‘inner investment’. 2001 Ann. Diagnostic Pathol. 5 21 There was abundant lymphoid infiltrate surrounding and invading the cell sheaths. < as lemmas |
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