Prokaryotes lack organelles such as nucleoli , mitochondria , plastids , golgi apparatus , and do not exhibit cyclosis 原核生物无细胞器，如核仁、线粒体、质体、高尔基体等，不出现胞质环流。
2.
Cyclosis ( cytoplasmic streaming ) the streaming of cytoplasm in a circular motion around the cell observed in some plants , particularly young sieve tube elements 胞质环流（胞质运动） ：在一些植物细胞特别是在幼筛管分子中观察到的细胞质围绕细胞的环形流动的现象。
