So, none of the fluid equations are applicable to blood?

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So, Bernoulli's equation doesn't apply because the blood is not ideal. None of the viscous fluid velocity equations apply because (P1-P2) changes as the heart works harder or less to accomodate pressures.

The only equation that applies is Q=vr^2, and even then it is ONLY when you consider the sum equivalent of all the blood vessels (ex, velocity in capillaries is lower than arteries).


hmmm, just wanting to confirm.

 

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Actually, what happens to blood flow velocity in vasodilation?

I know that Blood Flow Rate Q increases as more blood goes to the muscles. But is that just due to the increase in r^2? or does v actually increase as well?