There are three major types of body fluids in a human body, that is, extracellular body fluids, intracellular body fluids, and transcellular fluids. The extracellular body fluids are composed of cations and anions while the intracellular fluids are composed of 70% water and the rest are ions and molecules. The transcellular body fluid is composed of electrolytes like bicarbonates, sodium, and chlorides. The main functions of the body fluid in a human body include the facilitation of the transportation of nutrients and oxygen throughout the body, removal of waste from the body, regulation of body temperature, and maintaining an efficient metabolism in the body.