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England
A thousand miles from mnaasson's italy struggling with religious divisions and political upheaval seventeen century
England was heading for civil war
There was tension between the old and the new
A conflict embodied in the inquisitive mind of a physician working here at saying buffalo news hospital in london
William harvey was in many respects a traditionalist
But he started to investigate how the body works
This would force him to challenge and eventually overturn orthodox views
Whereas facilias had just observed structure
Harvey investigated function
Harvey questioned the widely accepted beliefs that blood is made by the liver
And consumed by the rest of the body
One of his most famous experiments was to calculate the volume of blood that passes through the heart
We've got some pig hearts here
And i'm going to fill up the pig heart with blood
I'm going to pork into the ventricles here a bit leaky
So here we have one heart tful of blood
And we're not going to weigh this on the balance
And it's approxmately tely over four houses
Harvey calculated a number of heart beats in a half hour period
He then multiplied this by the amount of blood in one cardiaac ejection that you like and came up with a stagggering gure harvest figures show that the heart can prepl in an astonishing four thousand leaders of blood
Every single day
That's an awful lot of blood
Now if accepted wisdom was correct
Then the body was making and using up this much blood
Every twenty four hours
The amount of blood was vstly an excess of the amount
That the livel could possibly produced during a day half y's experiments led into one conclusion
Blood must circulate around the body
The heart was no longer
Just a mysterious organ that infuses blood with the essence of life
It was now more like a pump
He was really putting forward a very very radical idea
It's a very courageous thing to do
To overturn the prevailing intellectual ethous on anything
