Immune System. Its like the Army for your body!
Answer:
Clearance of microorganisms and particulate antigens from the blood stream.
Synthesis of immunoglobulin G (IgG), properdin (an essential component of the alternate pathway of complement activation), and tuftsin (an immunostimulatory tetrapeptide)
Removal of abnormal red blood cells (RBCs)
Explanation:
the answer is a because if the model is based on experimental data it wont be good unless it has been tested.