• Question: how many veines are there in the brain?

    Asked by hpalasciano to Hannah on 28 Jun 2013.
    • Photo: Hannah Brotherton

      Hannah Brotherton answered on 28 Jun 2013:

      Hi hpalasciano,
      There are 400 miles of blood vessels (that includes veins, and capillaries, which are smaller, teeny weeny veins). The brain uses 20% of oxygen we inhale and the cells would start dying after we stopped breathing for just 3 minutes.

      In the whole human body there are 60000 miles of veins – that’s nearly 3 times the circumference of the world (circumference of the world is 24,901.55 miles)

      So we have a lot of vein everywhere 😀 keeping us alive!

      But did you know our brain is made up electrical activity, creating nearly 25 watts of power while you’re awake, which is enough to light up a light bulb.

      I wonder if you could light a torch just by putting it on your ha, I wish we could