细胞是生物体的基本结构和功能单位。所有细胞都有细胞膜(常称质膜)。真核细胞除质膜外还存在着细胞内膜系统构成的各种亚细胞结构、如线粒体、内质网、高尔基体、溶酶体、过氧化酶体和核膜等,这些膜结构(包括质膜)统称为生物膜。原核细胞没有线粒体、内质网、核膜,唯一的膜结构是质 Cell is the basic structure and function unit of organism. All cells have a cell membrane (often called the plasma membrane). Eukaryotic cells in addition to the plasma membrane also exists within the cell membrane system composed of a variety of subcellular structures, such as mitochondria, endoplasmic reticulum, Golgi, lysosomes, peroxisome and nuclear membrane, these membrane structures Plasma membrane) collectively referred to as biofilm. Prokaryotic cells without mitochondria, endoplasmic reticulum, nuclear membrane, the only membrane structure is qualitative