The Human Body
According to the widely cited 2013 scientific estimate, how many human cells make up the average adult body?
Answer
37,000,000,000,000 cells
About 37 trillion cells — and roughly 84% of them are red blood cells. You also carry about as many bacterial cells as human ones, so by headcount you're only half 'you'.
Source: Bianconi et al., Annals of Human Biology (2013)
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