Fluid balance ensures that the body stays hydrated; this is important for normal functioning of the body and optimal health. Maintaining fluid balance is vital for physical and mental performance. Water is one of the most essential nutrients that the body requires.
The human body is chiefly made of fluid. It constitutes about 60 percent of the body weight. All cells, tissues and organs in the body contain or need water to function. Fluid balance is the notion of human homeostasis that the volume of fluid removed from the body is equal to the volume of fluid taken in.
The condition of normal body fluid volume is known as euvolemia. Water is fundamental for all forms of life on Earth. Approximately 75 percent of muscle tissues and over 10 percent of fat tissues consist of water. Water helps to regulate body temperature, bolster and support joints and organs. It also facilitates digestion. The body loses about 700 milliliters of water through everyday functions, such as sweating and exhalation. Excretion causes the body to lose more than 100 milliliters water. It loses about 1.5 liters through urine and 200 milliliters through normal perspiration.
It is critical to replace the water lost through these processes. Drinking enough water helps to balance them out. The human metabolic processes produce approximately 250 milliliters of water, and eating food yields about 750 milliliters. All drinks containing water, such as fruit juice, soft drinks, tea and pure water, contribute to the total amount required for hydration.