Blood resistance and how it works
Understand the Problem
The question is asking about blood resistance and the mechanisms behind it. This likely refers to the body's ability to prevent blood loss or defend against blood-borne pathogens. A comprehensive answer should cover aspects of hemostasis (clotting) and the immune system's response to infections in the bloodstream.
Answer
Blood resistance, or vascular resistance, opposes blood flow in the circulatory system and is affected by vessel diameter, blood viscosity, and vessel length.
Blood resistance, also known as vascular resistance or systemic vascular resistance (SVR), is the opposition to blood flow in the circulatory system. It is influenced by factors like blood vessel diameter, blood viscosity, and vessel length. Vasoconstriction (vessel constriction) increases SVR.
Answer for screen readers
Blood resistance, also known as vascular resistance or systemic vascular resistance (SVR), is the opposition to blood flow in the circulatory system. It is influenced by factors like blood vessel diameter, blood viscosity, and vessel length. Vasoconstriction (vessel constriction) increases SVR.
More Information
Systemic vascular resistance (SVR) is a vital part of cardiac function because it affects blood pressure and blood flow. When blood vessels narrow, resistance increases; when they widen, resistance decreases.
Tips
A common mistake is to only consider vessel diameter, while viscosity and vessel length also play significant roles in determining resistance.
Sources
- Peripheral vascular resistance (systemic vascular resistance, SVR) is the resistance in the circulatory system - ncbi.nlm.nih.gov
- Vascular resistance - Wikipedia - en.wikipedia.org
- Resistance to Blood Flow - CV Physiology - cvphysiology.com
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