How does blood help regulate the water content of cells?

Blood helps regulate the water content of cells through osmosis and the balance of electrolytes. The plasma in blood contains solutes, such as salts and proteins, which create an osmotic gradient that influences the movement of water in and out of cells. When the concentration of solutes in the blood changes, it can cause water to move between the bloodstream and cells, maintaining proper hydration levels. This regulation is crucial for cellular function and overall homeostasis in the body.