The system regulates blood volume and pressure, stimulates red blood cell formation, and controls fluid, electrolyte, and acid-base balance.

Answer

          The Circulatory  system regulates blood volume and pressure, stimulates red blood cell formation, and controls fluid, electrolyte, and acid-base balance.

Explanation

           Human body is a very complex structure having different organ system like kidneys that filter out wast products, lungs that help in the exchange of gases and brain that control all the activities of body. however, all these are governed by circulatory system because blood is a fluid that keep the body clean from all sort of materials not need for body

Forexample

              The release of CO2 in cellular respiration inside cell is lethal as it change blood pH, therefore its is exhaled outside from body through lungs, but blood bring this CO2 to lungs for exhange outside.

            During excretion waste products which are produced in every cell of the body are accumulated into waste products. its also done by circulatory system. The need of ATP in every cell is also controlled by blood movement.  Thus circulatory system help in homeostasis of all sort of fluid, ions or other compounds present in human body.