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13 Cards in this Set
- Front
- Back
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What are arteries? |
Blood vessels carrying blood away from the heart |
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What are arterioles? |
Branched from the main artery |
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What are capillaries? |
Thin walled, allows for exchange of material, contains precapillary sphincter |
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What are venuoles? |
Smaller veins that will merge to become the main vein |
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What are veins? |
Contain valves, allow blood to flow back to the heart in one direction |
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What does the capillary wall consist of? |
Mostly endothelial cells |
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What are the three types of capillaries? |
Continuous – do not have fenestra Fenestrated – Have pores Sinusoidal – large diameter with large fenestra |
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What are metarterioles? |
Blood flows from arteriole through metarterioles, then through capillary network |
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What is the purpose of venules in the capillary network? |
They drain the network |
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How is blood flow regulated though the capillary network? |
Smooth muscle in arterioles, metarterioles, precapillary sphincters regulates blood flow |
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What is arteriosclerosis? |
General term for degeneration changes in arteries making them less elastic |
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What is atherosclerosis? |
Deposits of plaque on walls of artery |
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What happens as the diameter of vessels decreases? |
The total cross-section area increases and velocity of blood flow decreases |
