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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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goldenganser goldenganser
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10 years ago
Hi everybody I was working on this problem for my assignment but I was having a little trouble. 
I've explained how these three things could affect SVR 1. diameter of blood vessel 2. viscosity of blood and 3. length of blood vessel.  I'm just wondering first off, am I right and secondly, is there anything else I should add?
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10 years ago
It is controlled by three different factors: length of the blood vessel (l), radius of the blood vessel (r), and the viscosity of the blood (η). The equation that relates these three factors to resistance is known as Poiseuilles' equation:

R ≈ (η x l) / r4

Let me know if you need help explaining this.
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