原生质膜，又称质膜、细胞膜，是细胞结构中分隔细胞内、外不同介质和组成成份的界面。
按顶体的形态可以划分为十种类型：(1)原生质膜及顶体完好。
The change of acrosomal morphology may be classified into 10 categories: (1) plasma membrane and acrosome intact.
原核细胞和真核细胞在许多方面很像，都被细胞膜或原生质膜包着。
Prokaryotic and eukaryotic cells are similar in several ways. Both are surrounded by a cell membrane, or plasma membrane.
原生质膜的内折，尤其存在于真菌的菌丝和孢子中，在某些藻类和高等植物中也存在。
Lomasome an infolding of the plasma membrane found particularly in fungal hyphae and spores, and also in some algae and higher plants.
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