Final answer:
Red blood cells transport oxygen, white blood cells defend against pathogens, blood plasma carries substances.
Explanation:
Red blood cells: The main function of red blood cells is to transport oxygen from the lungs to all body tissues and then transport carbon dioxide back to the lungs.
White blood cells: White blood cells play a crucial role in the immune system, defending the body against pathogens like bacteria and viruses by destroying them or producing antibodies.
Blood plasma: Blood plasma carries various substances such as nutrients, hormones, and waste products throughout the body, helps in maintaining blood pressure, and aids in blood clot formation.
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