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The cytosol is not a "soup" with free-floating particles, but is highly organized on the molecular level. The cytosol also contains the cytoskeleton. It is made of fibrous proteins ( microfilaments, microtubules, and intermediate filamentIntermediate filaments are one component of the cytoskeleton important structural components of living cells. Their size is intermediate between that of microfilaments and microtubules. They are assembled from several different proteins. IFs crisscross ths) and (in many organisms) maintains the shape of the cell, anchors organelles, and controls internal movement of structures, e.g., transport vesicleIn cell biology, a vesicle is a relatively small and enclosed compartment, separated from the cytosol by at least one lipid bilayer. Vesicles store, transport, or digest cellular products and wastes. This biomembrane enclosing the vesicle is the same as ts.

As the concentration of solubleA substance is soluble if it dissolves in certain fluids. The dissolved substance is called the solute and the fluid (present in excess) is called the solvent, which together form a solution. The process of dissolving is called solvation, or hydration if molecules increases within the cytosol, an osmotic gradient builds up toward the outside of the cell. Water is flowing into the cell, making it larger. To prevent the cell from bursting apart, molecular pumps in the plasma membrane, the cytoskeleton, the tonoplast or a cell wallA cell wall is a more or less solid layer surrounding a cell. They are found in most bacteria, fungi, plants, and algae. Animals and most other protists have cell membranes without surrounding cell walls. When a plant or fungal cell wall is removed using (if present) are used to counteract the osmotic pressure.

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The cytosol is 20% to 30% protein.

Normal human cytosolic pHAlternate uses: see Ph pH (potential (of) hydrogen) is a measure of the concentration of hydrogen ions (H+) in a solution and, therefore, its acidity or alkalinity. The concept was introduced by S. Sorensen in 1909. The p stands for the German potenz mean is (roughly) 7.0 (i.e. neutral), whereas the pHAlternate uses: see Ph pH (potential (of) hydrogen) is a measure of the concentration of hydrogen ions (H+) in a solution and, therefore, its acidity or alkalinity. The concept was introduced by S. Sorensen in 1909. The p stands for the German potenz mean of the extracellular fluid is 7.4.