Final answer:
The regulatory functions of blood include maintaining homeostasis, supporting growth, and playing a protective role by transporting necessary components.
Step-by-step explanation:
The regulatory functions of blood include maintaining homeostasis by stabilizing pH, temperature, osmotic pressure, and eliminating excess heat. Blood supports growth by distributing nutrients and hormones, and by removing waste. Blood plays a protective role by transporting clotting factors and platelets to prevent blood loss and transporting white blood cells to sites of infection.