Convoluted invaginations of the cell membrane form specialized structures called mesosome which function in the formation of cross-wall during cell division。
细
曲，内陷可形成一种特有的结构，称
介体。其功能与细分裂有关。
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In a very similar way, the membranes covering your lungs for example, are actually invaginations of your epithelium — where the tissue that makes up your you-tube folds to form a cavity — just like this balloon when I push my fingers into it.
打个比方，覆盖在
薄膜实际上是上皮内陷——构成输卵管
折叠形成一个腔——就像我把手指伸进去这个气球。
及到细
