How many kilometres of blood vessels are in a human body?
Science hard Data from 2023
Guess before you scroll — the answer is below
The answer
100,000 kilometres
Roughly 100K.
Laid end to end, the blood vessels in one adult would stretch about 100,000 km — two and a half times around the Earth. Most of that length is capillaries thinner than a human hair.
Where this number comes from
| Source | National Institutes of Health |
|---|---|
| Figure refers to | 2023 |
| Last checked | |
| Unit | kilometres |
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