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15 Cards in this Set
- Front
- Back
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What are the 5 main types of blood vessels?
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arteries, arterioles, capillaries, venules, and veins
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What is the main function of arteries?
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carry blood away from the heart
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What are the 3 layers in an artery?
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tunica interna (inner layer), tunica media - maintains elasticity and contractility (middle), and tunica externa (outer).
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Many arteries anastomose. What does that mean?
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that the distal ends of 2 or more vessels unite. An anatomosis between arteries provies alternate routes for blood to reach a tissue or organ
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What is vasoconstriction?
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decrease in the size of the lumen of a blood vessel
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What is vasodilation?
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increase in the size of the lumen of a blood vessel
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Arteries play a key role in vasodilation and vasoconstriction. What does that mean?
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regulates blood flow from arteries into capillaries and in altering arterial blood pressure
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What is the function of capillaries?
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connect arterioles and venules.
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What are venules?
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small vessels that are formed from the union of several capillaries; venules merge to form veins
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What is the function of venules?
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drain blood from capillaries into veins
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What is vasodilation?
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increase in the size of the lumen of a blood vessel
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Arteries play a key role in vasodilation and vasoconstriction. What does that mean?
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regulates blood flow from arteries into capillaries and in altering arterial blood pressure
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What is the function of capillaries?
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connect arterioles and venules.
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What are venules?
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small vessels that are formed from the union of several capillaries; venules merge to form veins
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What is the function of venules?
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drain blood from capillaries into veins
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