Structure and composition of the cytosol
The cytosol or cytoplasmic matrix is the fluid that is located inside the cells. It constitutes the majority of the intracellular fluid.
In eukaryotic cells, the cytosol is found within the cell membrane and is included in the cytoplasm, but it is not within the organelles or the nucleus.
In eukaryotic cells, the cytosol or hyaloplasm occupies most of the cell volume.
The cytosol is made up of between 70 and 75% water, the rest of its components forming a colloidal solution: protides (amino acids, enzymes, structural proteins, etc.), lipids, carbohydrates (polysaccharides, monosaccharides, etc.), nucleic acids (nucleotides, nucleosides, tRNA, mRNA, ATP, etc.), products of metabolism and dissolved mineral salts.
The water content in the cytosol is variable, since it can show two states with different consistency: the gel state, of viscous consistency, and the sol state, of fluid consistency. The cell can change the state of the cytosol from sol to gel or vice versa, depending on the needs of the cell. These changes allow the amoeboid movement with which the cell can move.