Any fluid that is produced by a living organism is referred to as body fluid. These body fluids can be with extracellular fluid or intracellular fluid. Extracellular fluid refers to the fluid which is located outside the cells of the body, for example, lymph, intravascular fluid, transcellular fluid, and interstitial fluid. The water, dissolved ions, and molecules present inside a cell denote the intracellular fluid. Extracellular fluid constitutes 26% of the total body water composition whereas intracellular fluid constitutes 67% of the total body water composition. There are 7 types of body fluids, namely – blood, gastric juices, mucus, cerebrospinal fluid, saliva, semen and urine.  Body fluids and circulation are related, through circulation fluids help to regulate body temperature and water content, facilitates digestion, etc.