👉 Red blood cells are tiny, biconcave discs filled with hemoglobin, swiftly carrying oxygen throughout the body. White blood cells act as the immune system's warriors, engulfing invaders to protect against disease.
👉 Red blood cells are tiny, biconcave discs filled with hemoglobin, swiftly carrying oxygen throughout the body. White blood cells act as the immune system's warriors, engulfing invaders to protect against disease.
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