and here's your host dr cost and they could top it. imagine me writing this bike 3 times around the world i would surely have to see a mechanic to get a few paired sometimes not so hot and this is the distance our blood travels around in our bodies have are old times because of our optimism veins at a distance of more than 100000 kilometers and this is not all our blood down as it helps us doctors to diagnose certain diseases sometimes even before a patient gets symptoms. and that's why i'm here at berlin's that today this is where 65000000 blood samples are examined every year the scientific director office all these cliff talk he knows everything about not he will tell us how a few drops of it can tell us everything about all our lives or killed. lats