Extracellular Fluids?

What Types of Substances Are Found in the Intracellular and
Extracellular Fluids?
In our body fluids we would find small dissolved substances such as ions,
amino acids, and the carbohydrate glucose, as well as larger proteins. The
major ions (or electrolytes) would include potassium (K+), sodium
(Na+), chloride (Cl−), calcium (Ca2+), magnesium (Mg2+), phosphate
(PO43−), and bicarbonate (HCO3−). As demonstrated in Figure 2.2, all of
these and other substances will be found in both the intracellular and
extracellular fluids. However, the concentration of substances dissolved
in either fluid varies and the plasma membrane is bestowed with the
awesome responsibility of functioning as a barrier between the two
mediums.