Diameter (neutrophil)13 millionths m
5.4 billionthsNASCAR ovals
1.2 millionthsGarbage truck lengths
650 millionthsAcorn lengths
13 micrometers
Photo from Wikimedia Commons
White Blood Cell
Your immune system's front-line soldier/Medicine & Biology
White blood cells (leukocytes) are the mobile defense force of the immune system. A typical neutrophil is about 12-15 micrometers in diameter and lives only 5-90 hours before being replaced. Your body produces about 100 billion new white blood cells every day. They can squeeze through gaps between cells to reach sites of infection, like tiny biological commandos.
Measurements
Mass of single cell1 trillionths kg
7.1 trillionthsSyrian hamsters
222 quadrillionthsHouse cats
About 1 nanogram
Cell volume300 quintillionths m^3
6 billionthsEyedrops
7.2 octillionthsGrand Canyons
3.9 quadrillionthsFish tanks
About 300 femtoliters
Migration speed330 billionths m/s
1.1 millionthsRoombas
367 trillionthsRifle bullet speeds
3.1 billionthsPeregrine falcons
About 20 micrometers per minute
Lifespan (neutrophil)259,200 s
274 millionthsGenerations
864,000Blinks of an eye
173Pomodoro timers
About 3 days average