How many veins are there in a human body?

It's actually one vein located in the heart, stretching out in all sorts of directions. There isn't an exact amount since it dramatically varies between body to body, but there are millions of veins. Altogether, the veins would be about 60,000 to 100,00 million miles.

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There is not an exact number but children's veins stretch to about 60,000 miles and an adults are about 100,000 miles