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test 2

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
pulmonary circuit   capillaries going to the lugs where blood becomes oxygenated; the heart and lungs  
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systemic circuit   oxygen leaves the blood and CO2 enters the blood from the muscles; the limbs of the body  
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arteries   always carry blood away from the heart; high blood pressure; thicker walls; never have valves  
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veins   carry blood toward the heart; low blood pressure; thinner walls; may have valves  
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elastic (large) arteries   aorta, pulmonary trunk and their close branches  
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muscular (medium) arteries   distribute blood to head, limbs and organs  
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arterioles   distribute blood withing organs and tissues  
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capillaries   primary site for exchange of gases, nutrients, ions, wastes, hormones, cells, etc; smallest of blood vessels  
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venules   gather blood from capillaries; also some exchange of same materials as capillaries  
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small veins   gather blood from tissues  
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medium veins   gather blood from head, limbs and organs  
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large veins   return blood to heart  
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endothelium   entire circulatory system is lined by this simple squamous epithelium  
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Created by: shill14
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