👉 Red blood cells are tiny, round discs packed with hemoglobin that carry oxygen from lungs to body tissues. White blood cells act as the body's defense system, swiftly identifying and engulfing invaders to fight infections.
👉 Red blood cells are tiny, round discs packed with hemoglobin that carry oxygen from lungs to body tissues. White blood cells act as the body's defense system, swiftly identifying and engulfing invaders to fight infections.
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