Where is the Cytoplasm found?
The intracellular fluid of inside a cell called the cytosol. It is separate from certain cell organelles such as the nucleus and the mitochondria. In eukaryotes, the cytoplasm is the content within a cell membrane minus the content in the cell nucleus. It is where many metabolic reactions occur, there are still others within organelles. In prokaryotes, cytosol is where most metabolic chemical reactions occur. These reactions also occur in the membranes or in the periplasmic space but to a lesser extent.
A complex mixture of substances dissolved in water forms the cytosol even though water is the large majority of the mixture. Sodium and potassium concentrations are different in the cytosol compared with the concentrations in the extracellular fluid. The difference in ion levels are important for osmoregulation and cell signaling. Besides ions, the cytosol also has macromolecules.
Cytoplasm vs. Cytosol
There is often much confusion between the cytoplasm and the cytosol. The cytoplasm is the fluid contained within the cell that holds and surround the cell's organelles in a liquid environment which is necessary for many of the cell's vital functions to occur. Some of the organelles that are held within the cytoplasm include the mitochondria, the golgi apparatus, the endoplasmic reticulum, and other organelles. One thing to note is that the nucleus isn't considered to be part of the cytoplasm because it contains its own type of fluid-like material that is referred to as the nucleoplasm. The materials that are found within the cytoplasm are also typically found within the cell membrane. Typically, the cytoplasm contains materials that are known as cytoplasmic inclusions. These inclusions are typically starch granules, mineral crystals, or lipid droplets that are floating around within the cytoplasm.