Cytoplasmic streaming is the flowing of cytoplasm in eukaryotic cells. This occurs in both plant and animal cells. It creates cytoplasmic reorganization during cell reproduction. In some protists, such as amoeba, it provides the mechanism for cell locomotion. It aids in the delivery of nutrients, metabolites, and genetic information to all parts of larger plant cells. It vigorously "stirs" these components about the cytoplasm, allowing them to flow to all parts of the cell. As membrane-bound organelles crawl along the inner cell wall they set the cytoplasm into motion. This streaming allows other organelles and nutrients to flow in the stream created. Actin filaments play a role in streaming.
Cyclosis is the circulation or streaming of the cytoplasm within some living cells. In plant cells, chloroplasts may be moved around with the stream, possibly to a position of optimum light absorption for photosynthesis. The rate of motion is usually affected by light exposure, temperature, and pH levels.
The flow of cytoplasm may be stopped by:
   | Actin and Myosin in Nonmuscle Cells - Actin and Myosin in Nonmuscle Cells |
| | Cytoplasmic streaming in cylindrical giant algae! - Cytoplasmic streaming in cylindrical giant algae. |
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