The Body's Tiny Defense System
When a sniffle strikes, two curious kids shrink down to meet the body's tiny defenders—white blood cells, antibodies, and more—as they discover how the immune system spots germs and fights them off.
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🔬 Science Element
El sistema digestivo convierte la comida en nutrientes que el cuerpo puede usar. La comida viaja por la boca, el esófago, el estómago y los intestinos, donde enzimas y ácidos ayudan a descomponerla antes de que los nutrientes se absorban en la sangre.
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