Re: W/C flow like problem, but with a biological twist!
Just a guess/speculation, but could the purpose be to allow more space for connecting the branching capillaries to the spiral arteries?
By spiraling the supply line, pack more surface area to branch off? Instead of having (random number here..) 10 branches running off in an inch run, you could possibly have 25-30, depending on how tightly the spiral is wound.
Just a thought, though.
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