Cyclosis is streaming of cytoplasm within a living cell without deformation of the external cell membrane. A cell structure has two main parts, nucleoplasm, and cytoplasm
Nucleoplasm is a type of protoplasm that is made up mostly of water, various molecules, and dissolved ions. It is a gel-like sticky material covered by nuclear envelope and supports the chromosomes and nucleoli. It does not have cyclosis or streaming.Cytoplasm has an outer plasma membrane, number of organelles and the fluid part containing minerals, sugars, and proteins. It forms a bulk of cell and is in constant motion or cyclosis to carry out different metabolic activities of cell function.