anatomy ch 11

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blood vessels

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14 Terms

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artery

carry blood away from the heart

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veins

carry blood to the heart

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capillary

vessels that return blood to the heart

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what enters/exits capillaries?

oxygen and nutrients enter, carbon dioxide and waste leave

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arteriole

small arteries

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venule

small veins

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tunica intima

endothelium lining, reduces friction

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tunica media

smooth muscle/elastic tissue, controlled by sympathetic nervous system

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tunica externa

mostly fibrous CT, supports and protects vessel

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systole

contracton

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diastole

relaxation

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circle of willis

arterial supply to brain

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hepatic portal vein

supplys blood to the liver

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venous thrombosis

blockage of a vein caused by a blood clot