Residents immune system cells (cellular defence mecha¬nism) relies on the blood cells to destroy foreign invaders. Or pathogens that can enter the body. Blood cells that play a role include blood cells (hemocyte) 3 types of hyaline cell, semi-granular call, and large granular cell, which are scattered by the tissue. Within the bloodstream, lymph (lymphoid organ) myocardium. hepatopancreas And other organs
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