Cytosol
![The cytosol is a crowded solution of many different types of molecules that fills much of the volume of cells.[1]](/Images/godic/202501/04/Crowded_cytosol2315.png")
![](/Images/godic/202501/04/Animal_Cell.svg2315.png")
![Intracellular fluid content in humans](/Images/godic/202501/04/Cellular_Fluid_Content2315.jpg")
![Carboxysomes are protein-enclosed bacterial microcompartments within the cytosol. On the left is an electron microscope image of carboxysomes, and on the right a model of their structure.](/Images/godic/202501/04/Carboxysome2315.png")
The cytosol or cytoplasmic matrix is the liquid found inside cells. It constitutes most of the intracellular fluid (ICF). It is separated into compartments by membranes. For example, the mitochondrial matrix separates the mitochondrion into many compartments.