How many metres of new blood vessels does a kg of extra weight require?

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Rose Peters

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Rose Peters  asked the Naked Scientists:
   
I heard along the way that when a person gains weight, the body then has to manufacture more blood vessels.  

If this is true, how many metres of vessels per kg of mass gained?

What do you think?
« Last Edit: 08/03/2010 09:30:02 by _system »

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Offline hapbuk

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I believe it is one mile of capillaries for every pound of weight gained (that may be a myth, but it is one I have heard).

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Offline CliffordK

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Different body tissues have different metabolic needs, and thus different blood vessels. 

Fat has a very low metabolic rate, and thus it would likely have the least number of blood vessels.

Muscle has a much higher metabolic rate, and thus more blood vessels.