Subject: What is the relative total length of veins, arteries, and capillaries?

I am an ecologist trying to teach a lay audience about ecological "circulatory
systems" (i.e., streams and rivers) and wish to make some key comparisons to the
human circulatory system.  I have seen estimates of 60,000 -100,000 miles for
the total length in the human body and that capillaries comprise most of this
length. Similarly small streams are far longer than large rivers in aggregate. 
A rough estimate for the "human breakdown" would illuminate my example.  Thanks!

Re: What is the relative total length of veins, arteries, and capillaries?