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red blood cells- disc shaped and lack nucleus; red because of hemoglobin that transports oxygen | white blood cells-nucleated and specialized for different purposes; mainly used for defense against pathogens | platelets-fragments of larger cells that are only present in bone marrow

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1. red blood cells- disc shaped and lack nucleus; red because of hemoglobin that transports oxygen | white blood cells-nucleated and specialized for different purposes; mainly used for defense against pathogens | platelets-fragments of larger cells that are only present in bone marrow





 
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