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
The digestive system breaks food into nutrients the body can use. Food travels through the mouth, esophagus, stomach, and intestines, where enzymes and acids help break it down before nutrients are absorbed into the blood.
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