We will avoid this all-encompassing term because it gives the idea that this part of the cell is somehow a uniform fluid. With the advent of the electron microscope we have discovered other structures floating in this region of the cell and so we generally avoid the term cytoplasm . In its place we simply use cytosol to refer to the liquid around all of the floating structures between the nucleus and cell membrane. The cytosol is mostly water, but significantly contains many dissolved substances. Notable among these substances are enzymes.
Enzymes are proteins that cause certain chemical reactions to occur at a much faster rate.
Thus these enzymes are involved in the chemical processing that actively takes place in the cytosol. Some of the floating membranes in the cytosol include a network of tiny tubes that interconnect throughout the inside of the cell. This network is involved in the transport of materials from one part of the cell to another, and maintains the integrity of the membranes surrounding the nucleus. This is the conveyor belt of the cell. On the surface of some of the endoplasmic reticulum are thousands of tiny structures in the cytosol called ribosomes .