The human brain is only a few pounds, but it packs a lot into a small space. About how many miles of blood vessels are there in the human brain?

There are 100,000 miles of blood vessels in the human brain. For perspective, the distance around the equator is only 25,000 miles. So you'd have to travel 4 times around the world just to cover all the blood vessels in that 3 pound organ in your head.

Asked by Tom Cohen · Last updated 5 years ago · 2.4K views