Why artificial blood not carry out all of the life functions of blood cells?

Artificial blood, while designed to mimic some functions of natural blood, cannot perform all life functions of blood cells due to its limitations in complex biochemical processes. Natural blood cells, such as red blood cells, white blood cells, and platelets, have specialized roles, including immune response, oxygen transport, and clotting, which involve intricate interactions and adaptations to the body’s needs. Artificial substitutes often lack the ability to respond dynamically to physiological changes and cannot replicate the immune functions and regulatory mechanisms of natural blood components. Thus, while they can temporarily address certain needs, they cannot fully substitute for the diverse roles and complexities of natural blood.