Giantmicrobes Themed Gift Boxes - Blood Cells You wont faint at the sight of these adorable Blood Cells. Replace your hemophobia and learn to love your plasma, platelets and all the wonderful cells pulsing through your veins. After all, red blood cells dominate the 70 trillion cells and friendly bacteria in your body. You have about 20 trillion RBCs keeping you happy and energized. Includes these 5 mini microbes: Red Blood Cell, White Blood Cell, Plasma, Platelet, Antibody. Each mini microbe measures 2-4 inches.