Uploaded November 2024 | Updated September 2026, 3 weeks ago

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White blood cells play a crucial role in our immune system, crawling through tissues to hunt down and destroy harmful bacteria. But how fast do they actually move? And if they were scaled up to human size, how fast would that be?

1. **Original Speed of the White Blood Cell**
- Measured distance: 25 micrometers (µm)
- Time taken: 131 seconds
- Speed = Distance / Time = 25 µm / 131 s ≈ 0.2 µm/s

2. **Scaling Up to Human Size**
- White blood cell diameter: 20 µm
- My height: 1.76 meters = 1,760,000 µm
- Scale factor = My height / White blood cell diameter = 1,760,000 µm / 20 µm = 88,000

3. **Scaled-Up Speed**
- Scaled speed = Original speed × Scale factor
- Scaled speed = 0.2 µm/s × 88,000 = 17 mm/s

This description integrates the promised formulas and explanations in a clear, viewer-friendly way while encouraging engagement.
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