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        | Description: 7um dia; concave disk shape; entire cell stains pale pink; no nucleus Function: Transportation of respiratory gases (O2 & CO2)
 Life span: 105-120 days
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        | Description: 12-15 um dia; spherical shape; multilobed nucleus; small, pink-purple-staining cytoplasmic Granules Function: Cellular defense--phagocytosis of small pathogenic microorganisms
 Life span: Hours to 3 days
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