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14 Cards in this Set
- Front
- Back
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Functions of CVS
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Rapid transport of O2 and nutrients
Removal of CO2 and waste products Control system: distributes the hormones to tissues Regulates body temperature |
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Systole
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Contraction of heart
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Dystole
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Relaxation of heart
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Cardiac output
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Output from each ventricle per minute
CO = SV x HR |
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Venous return
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Volume of blood returning to each atrium per minute
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SV
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Volume of blood ejected from each ventricle during one beat
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HR
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Number of beats per minute
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Advantage of the portal system
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Digestive products absorbed from gut go directly to the liver for processing and don't have to go through the rest of circulation
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Factors that determine resistance
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Diameter of the blood vessel
How thick the blood is |
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Bulk flow/Darcy's law
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Blood flow = ΔP/Resistance
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What is the major cause of hypertension?
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Increase in resistance to flow
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Flow
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Volume displaced per time
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Velocity
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Cardiac output / Total cross sectional area
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Pressure drops across systemic circulation
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Aorta > large arteries > small arteries > arterioles > capillaries > venules > veins
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