ANATOMY

Detailed explanation-1: -The kidneys regulate circulatory volume by controlling sodium and water balance, thus maintaining extracellular fluid volume (ECFV) homeostasis. Simply put, an increase in sodium and water consumption leads to an increase in ECFV, which in turn increases blood volume.

Detailed explanation-2: -The kidneys maintain homeostasis by controlling the amount of water, ions, and other substances in the blood. Kidneys also secrete hormones that have other homeostatic functions.

Detailed explanation-3: -The kidneys are essential for cleansing the blood and eliminating urine waste from the body. They also have other important functions that maintain homeostasis in the body including regulating acid-base balance, the concentration of electrolytes, controlling blood pressure, and secreting hormones.

Detailed explanation-4: -For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance. The cardiovascular and lymphatic systems transport fluids throughout the body and help sense both solute and water levels and regulate pressure.

Detailed explanation-5: -As humans continuously lose water through urine and feces, perspiration, and respiration, a finely balanced and sensitive network of physiological controls is necessary to maintain water levels. This is body water homeostasis, which is maintained by stimulating fluid intake by thirst.