Red Blood Cells: have the shape of a flat disk or doughnut, deliver oxygen to the tissues in your body, get their bright red color from a protein that allows them to carry oxygen from your lungs and deliver it to other tissues in your body (hemoglobin), take the carbon dioxide waste to your lungs for you to exhale, can maintain the immune system, White Blood Cells: a key part of the immune system that help the body fight infection and disease, have a short lifespan of one to three days, Produce an allergic response like coughing, sneezing or a runny nose, are colorless, round cells,

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