👉 Regulated fluids, also known as total body water (TBW), encompass all the water present in the human body, excluding blood plasma. This includes water stored in cells (intracellular fluid), interstitial fluid surrounding cells, and water in the blood, lymph, and other bodily fluids. Regulated fluids are tightly controlled by the body's homeostatic mechanisms to maintain a stable internal environment, crucial for proper physiological function. The kidneys play a key role in regulating these fluids by adjusting water reabsorption and excretion, while hormones like antidiuretic hormone (ADH) and aldosterone fine-tune fluid balance. This regulation is essential for maintaining blood volume, pressure, and overall cellular function.
