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What is systemic vascular resistance and what factors contribute to it?

What is systemic vascular resistance and what factors contribute to it?

Science   Anatomy-And-Physiology   
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Answer #1

Systemic vascular resistance is also called as peripheral resistance and in simple terms means the resistance of arteries to the blood flow.SVR dictates the blood pressure.This is done through various centers present in the reticular formation of the brain stem

The formula for systemic vascular resistance is

SVR=8n/r^4

8 is the integer of the velocity of flow

n is the viscosity of the blood

r is the radius of the blood vessels

These are the factors that control systemic vascular resistance

The radius of the arterioles is highly modifiable due to presence of smooth muscles in the region and there alters the SVR and ultimately BP.

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