单词 | epithelium |
释义 | epitheliumnoun ep·i·the·li·um ˌe-pə-ˈthē-lē-əm plural epithelia ˌe-pə-ˈthē-lē-ə 1 : a membranous cellular tissue that covers a free surface or lines a tube or cavity of an animal body and serves especially to enclose and protect the other parts of the body, to produce secretions and excretions, and to function in assimilation 2 : a usually thin layer of parenchyma that lines a cavity or tube of a plant |
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